The required value of the given function is (f ⋅ g)(4) = 130.
What are the functions?The function is defined as a mathematical expression that defines a relationship between one variable and another variable.
The functions are given in the question, as follows:
f(x)=3x+1 and g(x)=x²-6
(f ⋅g)(x) is the composition of the functions f and g, which means f(x) × g(x).
(f ⋅ g)(x) = f(x) × g(x)
So, substituting x = 4:
(f ⋅ g)(4) = f(4) × g(4)
= (3 × 4 + 1)×(4² - 6)
= 13 × 10
= 130
So, (f ⋅ g)(4) = 130.
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What does esperanza realize when she tries to save sally from making a bad decision or being exploited by the boys in "the monkey garden"?
Esperanza is aware of Sally's desire to avoid having to return back to school so you would not need to fret about her father, rumors, or feeling out of place.
Are monkeys suitable as pets?Monkeys are often undesirable pets. Yes, for a while, some may be extremely sweet. However, the truth is that monkeys cannot live in a human home because they are too dangerous and require too much care. These concerns pertain to apes and are just as significant (chimpanzees, orangutans, and gibbons).
Are we all apes?People and monkeys are both considered primates. But neither monkeys or indeed any other current ape species are linked to people. Yes, chimpanzees and humans both descend from apes.
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. In order to have a negative correlation between two variables, which of the following is most accurate? A. The covariance must be negative. B. Either the covariance or one of the standard deviations must be negative. C. The covariance can never be negative
In order to have negative correlation between two variables the covariance must be negative.
What is correlation?
The degree to which two variables are linearly related is expressed by the statistical concept of correlation (meaning they change together at a constant rate). It is a typical technique for outlining straightforward connections without stating cause and effect.
The correlation between two variables x and y is,
[tex]r = \frac{Cov(x, y)}{S_x*S_y}[/tex]
where,
Cov(x, y) is the covariance between x and y.
[tex]S_x[/tex] and [tex]S_y[/tex] respectively denotes the standard deviation of x and y.
If the correlation is negative then r < 0.
Now r < 0
[tex]\frac{Cov(x, y)}{S_x*S_y} < 0\\Cov(x, y) < 0\\Sx > 0, S_y > 0[/tex]
If r < 0 the Cov(x, y) < 0.
In order to have negative correlation between two variables the covariance must be negative.
Hence, in order to have negative correlation between two variables the covariance must be negative.
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Find an ordered pair (x,y) that is a solution to the equation
-x+5y=4
Answer:
(1, 1 )
Step-by-step explanation:
choose any value of x to substitute into the equation and solve for y
choosing x = 1 , then
- 1 + 5y = 4 ( add 1 to both sides )
5y = 5 ( divide both sides by 5 )
y = 1
then (1, 1 ) is a solution to the equation
Answer:
- x + 5 y = 4 (x = 6)
- ( 6 ) + 5 × 2 = 4 (y = 2)
- 6 + 10 = 4
4 = 4
∴ (6, 2) is an ordered pair that is a solution to the given equation .
Given P(10,12) and Q(20,36), find the coordinates of a point whose distance from both P and Q is exactly is exactly 13.
The coordinate of a point whose distance from both P and Q is exactly 13 is; (15, 24)
Pythagorean theorem:
According to the Pythagorean theorem, in a right triangle (90 degrees), the square of the hypotenuse equals the sum of the squares of the other two sides. Consider the following triangle ABC where BC2 = AB2 + AC2. where AB is the base, AC is the height (height), and BC is the hypotenuse.
The coordinate of a point whose distance from both P and Q is exactly 13 is; (15, 24)
The distance between points, P and Q can be evaluated by the Pythagoras theorem as follows;
Distance, PQ = √(20-10)² + (36-12)²
PQ = √(100+576)
PQ = √676
PQ = 26.
Therefore, a point whose distance from both P and Q is exactly 13 is the midpoint of PQ.
Therefore,
x = (20 + 10)/2
x = 15
y = (36 + 12)/2
y = 24.
The coordinate of a point whose distance from both P and Q is exactly 13 is; (15, 24)
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Help me out here pls
Answer:
x = 82°, y = 98°, z = 98°---------------------------------------
Property of a parallelogram:
Opposite angles are congruent and adjacent angles are supplementary.According to the property we have:
x = 82°y = z = 180° - 82° = 98°suppose that motorola uses the normal distribution to determine the probability of defects and the number of defects in a particular production process. assume that the production process manufactures items with a mean weight of 10 ounces. calculate the probability of a defect and the suspected number of defects for a 1,000-unit production run in the following situations. (a) the process standard deviation is 0.18, and the process control is set at plus or minus one standard deviation. units with weights less than 9.82 or greater than 10.18 ounces will be classified as defects. if required, round your answer for the probability of a defect to four decimal places and for the number of defects to the nearest whole number. probability of a defect: number of defects: (b) through process design improvements, the process standard deviation can be reduced to 0.06. assume that the process control remains the same, with weights less than 9.82 or greater than 10.18 ounces being classified as defects. if required, round your answer for the probability of a defect to four decimal places and for the number of defects to the nearest whole number. probability of a defect: number of defects: (c) what is the advantage of reducing process variation, thereby causing process control limits to be at a greater number of standard deviations from the mean? reducing the process standard deviation causes a - select your answer - in the number of defects.
P( X < 9.85 or X > 10.15 ) ≈ 0.3171 up to four decimal places.
P( X < 9.85 or X > 10.15 ) ≈ 0.0027 up to four decimal places.
ProbabilityThe simple definition of probability is the likelihood that something will occur. We can discuss the probabilities of different outcomes, or how likely they are if we are unclear about how an event will turn out. Statistics refers to the study of occurrences subject to probability.
According to the question
a) Assuming that X is the random variable that takes the place of the number of defectives and has a normal distribution with a mean of 10 ounces and a standard deviation (σ) of 0.15.
The random variable's values deviate from the mean by 1, causing them to either exceed or fall short of (10 + 0.15) and (10-0.15)
= 10.15 or 9.85.
The following formula may be used to determine the likelihood that there will be either more or lesser defects than the range of 10.15 to 9.85:
P( X < 9.85 or X > 10.15 ) = 1 - P[tex](\frac{9.85-10}{0.15} < \frac{X - 10}{0.15} < \frac{10.15-10}{0.15} )[/tex]
P( X < 9.85 or X > 10.15 ) = 1 - φ(1) - φ(-1)
Now we calculate the value of z for z = 1 and z = -1; we have: 0.841345 and 0.158655 respectively
P( X < 9.85 or X > 10.15 ) = 1 - (0.841345 - 0.158655)
P( X < 9.85 or X > 10.15 ) = 0.31713
P( X < 9.85 or X > 10.15 ) ≈ 0.3171 up to four decimal places.
b) It is possible to lower the process standard deviation to 0.05 by making modifications to the process design.
The following formula may be used to determine the likelihood that the number of defectives is either larger than 10.15 or lesser than 9.85:
P( X < 9.85 or X > 10.15 ) = 1 - P[tex](\frac{9.85-10}{0.15} < \frac{X - 10}{0.15} < \frac{10.15-10}{0.15} )[/tex]
P( X < 9.85 or X > 10.15 ) = 1 - φ(3) - φ(-3)
Now we calculate the value of z for z = 3 and z = -3; we have: 0.99865 and 0.00135 respectively
P( X < 9.85 or X > 10.15 ) = 1 - (0.99865 - 0.00135)
P( X < 9.85 or X > 10.15 ) = 0.00271
P( X < 9.85 or X > 10.15 ) ≈ 0.0027 up to four decimal places.
(c) What is the benefit of increasing the number of standard deviations from the mean for process control limits by minimizing process variation?
As we can see from the reduction from a to b above, the key benefit of minimizing process variance is that it will decrease the likelihood of receiving a defective item.
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Help me please I need help
Step-by-step explanation:
remember, to transform an equation we need to apply any operation to both sides of the equation. otherwise the equality relation is destroyed.
we want to get the equating to look like " x = ..."
so, the "+ 39" is in the way.
we need to subtract 39, but as mentioned, we need to do this on both sides.
x + 39 = 74
x + 39 - 39 = 74 - 39
x = 35 in
the fig tree is therefore 35 in. that is 39 in shorter than 74 in (the orange tree).
A picture $3$ feet across is hung in the center of a wall that is $19$ feet wide. How many feet from the end of the wall is the nearest edge of the picture?
a) 1 1/2 b) 8 c) 9 1/2 d) 16 e) 22
8 feet from the end of the wall is the nearest edge of the picture.
The process of converting phrases into equations and then solving those equations is known as solving algebraic word problems.
We will only need to use one variable and fundamental arithmetic operations to create the equations we require. In a real-world situation, the variable often stands for an unknowable quantity.
We can model and resolve word problems on the test that have two overlapping groups using Venn diagrams.
Let's say that the distance from the picture to the wall is x.
Since that distance will be on both sides of the picture (it's in the exact middle), we can say that:
x+3+x=19
=> 2x+3 = 19
=>2x=16
=>x= 8
Thus, 8 feet from the end of the wall is the nearest edge of the picture.
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a survey of 500 high school students was taken to determine their favorite chocolate candy. of the 500 students surveyed, 77 like snickers, 100 like twix, 80 like reese's peanut butter cups, 46 like snickers and twix, 57 like twix and reese's peanut butter cups, 48 like snickers and reese's peanut butter cups, and 44 like all three kinds of chocolate candy. how many students like snickers, but not twix or reese's peanut butter cups?
119 pupils, according to a Venn diagram, prefer Snickers or Reese's Peanut Butter Cups but not Twix.
what is Venn diagram?In the 1880s, John Venn popularized the Venn diagram, a common type of diagram illustrating logical links between sets. In probability, logic, statistics, linguistics, and computer science, diagrams are used to teach basic set theory and to illustrate straightforward set relationships. In a Venn diagram, overlapping circles and other shapes are used to represent the connections between two or more sets of elements. Highlighting similarities and differences between components when organizing information graphically frequently proves beneficial. A space in the middle of a Venn diagram is created by the intersection of two sizable circles.
The group of students that enjoy Snickers is represented by set A.
The students who enjoy Twix are represented by set B.
The students who enjoy Reese's Peanut Butter are represented by set C. All three types of chocolate candies are favorites among 19 students.
Snickers and Reese's Peanut Butter Cups are among the 31.
Reese's Peanut Butter Cups and Snickers alone = 31 - 19 = 12
82 like Twix and Reese's Peanut Butter Cups
149 like Snickers
149 − (51 + 12 + 19) = 67 for Snickers alone.
The number of students who prefer Snickers or Reese's Peanut Butter Cups but not Twix is equal to 67 + 40 + 12.
There are 119 pupils that enjoy Snickers or Reese's Peanut Butter Cups.
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the babylonians introduced such mathematical ideas as multiplication, division, and the concept of zero. true false
We can say that in geometry, Babylonian mathematicians were able to calculate the area of a trapezoid, suggesting that they were aware of the Pythagorean Theorem.
what is Pythagorean theorem?The Pythagorean Theorem, sometimes known as the Pythagorean Theorem, is the basic Euclidean geometry relationship between a right triangle's three sides. According to this rule, the area of a square with the hypotenuse side equals the sum of the areas of squares with the other two sides. The Pythagorean Theorem, often known as the generic algebraic notation a2 + b2 = c2, states that the square that crosses the hypotenuse of a right triangle opposite the right angle equals the sum of the squares that span the sides of a right triangle.
Other complex mathematical strategies were known to the Babylonians. For example, in geometry, Babylonian mathematicians were able to calculate the area of a trapezoid, suggesting that they were aware of the Pythagorean Theorem long before Pythagoras.
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a) the overall chord progression is always the same. b) each new cycle modulates up a half step. c) each twelve-bar cycle is called a chorus. d) the overall chord progression is always the same and each twelve-bar cycle is called a chorus only.
Each twelve-bar cycle in the twelve-bar blues form is referred to as a chorus, as well as the overall chord remains the same. The three sections of a big band are rhythm, reed, and brass.
Exactly why is a chords major or minor?What Characterizes a Chord as Minor or Major? One small adjustment—the third in a scale—is all that separates a major chord from a minor chord. Three notes from the major scale—the first, third, and fifth—are found in a major chord. The first, lowered third, and flatted fifth chords of a major scale that is named for are the notes that make up a minor chord.
A significant (A). A minor; C#; E. (Am). Major in A-C-E-C (C). C minor, E, G. (Cm). the key of C, and G. (D). D minor in D-F#-A key. significant in D-F-A-E. (E). E minor in E-G#-B key. E - G - B.
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two people start from the same point. one walks east at 3 mi/hr and the other walks northeast at 2 mi/hr. how fast is the distance between the people changing after 15 minutes?
The distance between the two people is changing at a rate of 3.2 mi/hr.
The distance between the two people can be calculated by using the Pythagorean theorem.
Let one person be at the origin (0, 0) and the other person be at (x, y). After 15 minutes, the first person will be at (3*15, 0) and the second person will be at (2*15*cos45, 2*15*sin45).
Using the Pythagorean theorem, the distance between them can be calculated as:
d = sqrt((3*15 - 2*15*cos45)^2 + (2*15*sin45)^2) = sqrt(225 + 225) = sqrt(450) = 21.213
The rate of change of distance is given by the formula d/t, where d is the distance and t is the time.
Therefore, the rate of change of distance between the two people after 15 minutes is 21.213/15 = 3.2 mi/hr.
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Let Y represent the profit (or loss) for a certain company X years after 1970. Based on the data shown
below, a statistician calculates a linear model Y = -0.80X + 7.96.
X
y
2
7.96
3
3.8
4 5.64
2.58
2.62
3.36
1.8
y=
56
7
8
Use the model to estimate the profit in 1973
The profit in 1973 is 5.56 which is estimated by the given linear model.
What is the regression equation?The regression equation is used to predict or estimate the value of the response (or dependant) variables based on an understanding of the explanatory (or predictor) variables.
Let Y represent the profit (or loss) for a certain company X years after 1970. Based on the data shown, a statistician calculates a linear model
Y = -0.80X + 7.96 ....(i)
Using the above model to estimate the profit in 1973
Substitute the value of X = 3 in the equation (i),
Y = -0.80(3) + 7.96
Y = -2.4 + 7.96
Y = 5.56
This is the profit in 1973.
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Write the equation for the product of 12 and 8
Answer:
the equation for the product of 12 x 8 = 96
what is the reciprocal of 4 4/7
Answer:
7/32
Step-by-step explanation:
First we need to make the mixed fraction an improper fraction
4*7=28
28+4=32
So, the improper fraction will be 32/7
a reciprocal is the opposite of a fraction
this means we will flip this fraction over, moving the 7 to the numerator and 32 to the denominator
7/32
4 x 10^5 write in standard notation form
Answer:
standard form:
4×100,000
400,000
Solve the puzzle from the clues one of is 3 when you pair me with 36 our LCM is 36 I am greater the 6 but less than 12 what is the mystery number
HELPPP PLSSS
Answer:
Step-by-step explanation:
The mystery number is 9. The least common multiple of 3 and 36 is 36. When you pair 9 with 36, their least common multiple is still 36. 9 is greater than 6, but less than 12. Therefore, the mystery number is 9.
You have $11.50 and you need to make copies of a flyer at a store that charges $0.15
per copy. Find the inequality that represents the number of copies you can make. Use
x as the variable.
What is the maximum number of copies you can afford to make?
Answer:
76
This is because, when you exceed 76 copies, the cost will be greater than 11.50 and you will not be able to afford it.
Step-by-step explanation:
To solve this inequality, you can divide both sides by 0.15: x <= 76.67
17. Wekhomba bought a laptop in Uganda for Ush.1, 050,000. He then paid 60 US dollars as transportation charges to Kenya. On arrival in Kenya he paid duty and sales tax amounting to 55% of the cost in Uganda. He then gave it to a friend in Tanzania tax free. If the exchange rates were I US dollar = Ush 1016, 1Ksh Ush 24.83 and Tsh 1 = Ksh 0.0714 i. ii. iii. iv. Calculate the total expenses in Kenya shillings incurred by Wekhomba. Find the expenditure on transportation and taxes as a percentage of the total expenditure. What is the total value of the laptop in Tanzanian shillings? Find the overall increase in value of the laptop as percentage of the buying price.
Answer:
i. To calculate the total expenses in Kenya shillings incurred by Wekhomba, we need to first convert the cost of the laptop in Uganda shillings to Kenya shillings using the exchange rate of 1 US dollar = Ush 1016. The cost of the laptop in Kenya shillings is (1,050,000/1016) = 1,032,474.40
We then need to add the transportation cost of 60 US dollars which is (60 * 1016) = 61,596 Kenya shillings.
Taxes in Kenya amounting to 55% of the cost in Uganda is (1,050,000 * 55/100) = 577,500 Uganda shillings which is (577,500/1016) = 567,715.20 in Kenya shillings.
The total expenses in Kenya shillings incurred by Wekhomba is 1,032,474.40 + 61,596 + 567,715.20 = 1,661,785.60
ii. To find the expenditure on transportation and taxes as a percentage of the total expenditure, we need to divide the sum of transportation costs and taxes by the total expenses and multiply by 100.
Expenditure on transportation and taxes is 61,596 + 567,715.20 = 629,311.20.
Expenditure on transportation and taxes as a percentage of the total expenditure = (629,311.20/1,661,785.60) * 100 = 37.9%
iii. To find the total value of the laptop in Tanzanian shillings, we first need to convert Kenya shillings to Tanzanian shillings using the exchange rate of 1Ksh = Ush 24.83 and Tsh 1 = Ksh 0.0714,
1,661,785.60 Kenya shillings is (1,661,785.60/24.83) = 668,817.51 Uganda shillings which is (668,817.51 / 0.0714) = 93,622,817.16 Tanzanian shillings
iv. To find the overall increase in value of the laptop as a percentage of the buying price, we need to divide the increase in value (total value in Tanzanian shillings - buying price) by the buying price and multiply by 100.
Overall increase in value = 93,622,817.16 - 1,050,000 = 92,572,817.16
The overall increase in value as a percentage of the buying price = (92,572,817.16/1,050,000) * 100 = 88.1%
Step-by-step explanation:
Find the coordinates of the orthocenter of each triangle with the given vertices.
J(3,-2) K(5,6) L(9,-2)
The coordinates of the orthocenter of the triangle J(3,-2) K(5,6) L(9,-2) are (5, -2).
What is an orthocenter?Generally, The orthocenter of a triangle is the intersection of the lines that contain the altitudes of the triangle.
To find the coordinates of the orthocenter, we first need to find the equations of the lines containing the altitudes.
To find the equation of the altitude from vertex J, we need the coordinates of J, K, and L.
Using the given coordinates, we have J(3,-2), K(5,6), and L(9,-2).
The equation of the line containing the altitude from J is:
-2 = (-2-6)/(3-5) (x-5) + 6
The equation of the line containing the altitude from K is:
6 = (-2-6)/(5-9) (x-9) - 2
The equation of the line containing the altitude from L is:
-2 = (6-(-2))/(5-3) (x-3) + 2
Solving the equation of the line containing the altitude from J and L, we get the x-coordinate of the orthocenter is 5 Solving the equation of the line containing the altitude from K and L, we get the y-coordinate of the orthocenter is -2
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Look at where the diver started and where she is heading. She started at –5 and descended to –75. That means she dropped 70 feet more.
These two points on the number line describe that she descended by 70 units.
What is a number line?A number line is defined as the number marked on the line calibrated into an equal number of units. For example -1, 0, 1, and so on.
Here,
She started at –5 and descended to –75.
On the number line, the difference between -75 and -5 is given as
= -5 - (-75)
= 70
Thus, these two points on the number line describe that she descended by 70 units.
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5. Adam the Ant and Anna the Ant dared each other to grab a moving bicycle wheel. Adam the Ant hung on for 20 seconds, in which time the wheel made 30 turns; then, he fell off. Anna the Ant hung on 12 seconds longer than Adam the Ant. How many times did she spin around on the bicycle wheel?
Answer:
48
Step-by-step explanation:
Rate of change;
20 seconds 30 turns
30/20 is the number of turns per second.
3/2 x 12 = 18 There were 18 turns in the 12 seconds plus the 30 turns that she did in 20 seconds for a total of 18 + 30 = 48 turns
If Frosty's Freeze sells 9 ounces of ice cream for $4.95, what is the cost per ounce of the ice cream?????
Nancy makes green bracelets, g, and red bracelets, r. She sells each green bracelet for $5 and each red bracelet for $3. Which expression represents the total amount of money Nancy makes selling bracelets?
Answer:
........
Step-by-step explanation:
Solve - 1000=u³, where u is a real number.
Simplify your answer as much as possible.
If there is more than one solution, separate them with commas.
If there is no solution, click on "No solution".
The solution of u in the equation where u is a real number is -10.
What is a real number?In the number system, real numbers are only the fusion of rational and irrational numbers. These numbers can generally be used for all arithmetic operations and can also be expressed on a number line. Imaginary numbers, which are often known as unreal numbers since they cannot be stated on a number line, are frequently used to symbolise complex numbers.
Given that u is a real number and the value of [tex]u^3 = -1000[/tex].
Take cube root on both sides of the equation:
[tex]\sqrt[3]{u^3} = \sqrt[3]{-1000} \\\\u = \sqrt[3]{(-10)(-10)(-10)} \\\\u = -10[/tex]
Hence, the value of u is -10.
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A ball was thrown up into the air and allowed to bounce until it came to a halt.
At which of the following intervals did the height of the ball increase and then decrease?
O 0 < x < 4
O 2 < x < 2
Ο 5 < x < 7
O 7 < x < 9
At the interval of 0 to 4, the ball was thrown up into the air and allowed to bounce until it reached its peak height. Then, the ball began to decrease in height until it eventually came to a halt.
The ball's height increased from 0 to 4 meters as it was thrown up and allowed to bounce. Then, the ball's height decreased from 4 meters until it eventually came to a halt. The ball's height increased from 0 meters to 4 meters as it was thrown up into the air and allowed to bounce. The ball reached its peak height at the interval of 0 to 4 meters and then began to decrease in height until it eventually came to a halt. As the ball bounced, the energy of the ball was converted to different forms such as sound, heat, and kinetic energy. The force of gravity also played a role in the decreasing of the ball's height until it eventually stopped. The height of the ball fluctuated between 0 and 4 meters during the interval of 0 to 4 meters and then decreased until it reached its resting point.
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a newspaper publishes a negative editorial on how local politicians are dragging their feet in building a new bridge. what is the editorial? responses the editorial contains data but is not data itself. the editorial contains data but is not data itself. the editorial is facts. the editorial is facts. newspapers are not data. newspapers are not data. the editorial is data.
The total cost of the bridge will be (200/2) × 8 × 1000 + 50 × 10 + 500 = $90,000.
The formula for calculating the cost of a bridge is Cost = (Area of Bridge/2) × Unit Weight of Steel × Unit Price of Steel + Cost of Labor + Cost of Other Materials. By using this formula, we can determine the total cost of the bridge by considering the area of the bridge, the weight of the steel used, the price per unit of steel, the cost of labor, and the cost of other materials. For example, if the area of the bridge is 200m^2, the unit weight of steel is 8 tonnes/m^3, the unit price of steel is $1000/tonne, the cost of labor is $50 per hour, and the cost of other materials is $500, then the total cost of the bridge will be (200/2) × 8 × 1000 + 50 × 10 + 500 = $90,000. Thus, by using this formula, we can easily calculate the cost of the bridge and understand why local politicians are dragging their feet in building a new bridge.
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Answer: Editorial is data is the correct answer.
Step-by-step explanation: I took test and it is confirmed correct.
A line passes through the points (–6, 4) and (–2, 2). which is the equation of the line? y = negative one-half x 1 y = one-half x 7 y = –2x – 8 y = 2x 16
The equation of the line that passes through the points (-6,4) and (-2,2) is y - 4 = -1/2(x + 6)
What is the equation of the line?
To find the equation of a line that passes through two given points, we can use the point-slope form of the equation of a line, which is:
y - y1 = m(x - x1)
Where (x1, y1) is a point on the line, and m is the slope of the line.
The slope of the line can be found by using the two points:
m = (y2 - y1) / (x2 - x1)
So,
m = (2 - 4) / (-2 - (-6)) = -2/4 = -1/2
We know that the line passes through the point (-6,4) so we can substitute the values into the equation:
y - 4 = -1/2(x + 6)
Hence, the equation of the line that passes through the points (-6,4) and (-2,2) is y - 4 = -1/2(x + 6)
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This frequency distribution represents the commission earned (in dollars) by salespeople employed at several branches of a large chain store. Find the mean and modal class for the data
For the given data the mean is 180.28 and the modal class is 177 - 185.
First finding mean:
For the class of 150 - 158, the class boundaries are 149.5 - 158.5.
Middle value = (150 + 158)/2 = 154
Frequency = 5
mean= 154 × 5 = 770
For the class 159 - 167, the class boundaries are 158.5 - 167.5
Middle value = (159 + 167)/2 = 163
Frequency = 16
middle value. frequency = 163 × 16 = 2608
For the class 168 - 176, the class boundaries are 167.5 - 176.5
Middle value = (168 + 176)/2 = 172
Frequency = 20
middle value. frequency = 172 × 20 = 3440
For the class 177 - 185, the class boundaries are 176.5 - 185.
Middle value = (177 + 185)/2 = 181
Frequency = 21
middle value. frequency = 181 × 21 = 3801
For the class 186 - 194, the class boundaries are 185.5 - 194.5
Middle value (x_m) = (186 + 194)/2 = 190
Frequency = 20
middle value. frequency = 190 × 20 = 3800
For the class 195 - 203, the class boundaries are 194.5 - 203.5
Middle value = (195 + 203)/2 =199
Frequency = 15
middle value. frequency = 199 × 15 = 2985
For the class 204 - 212, the class boundaries are 203.5 - 212.5
Middle value = (204 + 212)/2=208
Frequency = 3
middle value. frequency = 208 × 3 = 624
Now in order to determine the mean of this group data all values calculated separately through the product of middle value and frequency will be added together and divided by the total frequency count (i.e 100).
That is
Mean = ( 770 + 2608 + 3440 + 3801 + 3800 + 2985 + 624 ) = 18028 / 100
Mean = 180.28
Now determine the model class:
Model class refers to the with the highest occurring frequency. So this is the class "177 - 183" having the frequency 21.
You can learn more about mean at
https://brainly.com/question/1136789
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Which choice has the smallest absolute value?
-10
-5
0
9
