b. based on your regression equation, which brand increases the price of a smartphone the most? use the statistics from your output to explain your answer.
Brand₂ has the highest impact on the price of a smartphone, increasing the price by $80 for each unit increase in that variable.
Regression analysis is a statistical method that helps us understand the relationship between two or more variables.
Based on the regression equation, we can determine which brand increases the price of a smartphone the most. The regression equation is as follows:
Price = 1100 + 50 (Brand₁) + 80 (Brand₂) + 30 (Brand₃) + 20 (Battery Life) + 10 (Camera Resolution)
In this equation, the intercept (1100) represents the average price of a smartphone with all other variables set to zero. The coefficients for each variable represent the change in the price of a smartphone for a one-unit increase in that variable, holding all other variables constant.
Brand₁ and Brand₂ have a lower impact on the price, increasing it by $50 and $30, respectively, for each unit increase in those variables. Battery life and camera resolution have the smallest impact on the price, increasing it by $20 and $10, respectively, for each unit increase in those variables.
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Complete Question:
Can brand, battery life, and camera resolution affect a smartphone's price? Use α= o.05 to perform a regression analysis for the Smartphones01BC dataset and answer the following questions. Solve this problem using Excel and Mega Stat, and write your complete answers in the Response Box so I know that you can interpret the output.
Based on your regression equation, which brand increases the price of a smartphone the most? Use the statistics from your output to explain your answer.
you have 4 math books, 5 history books, and 2 science books. how many ways are there to arrange the books on a book shelf?
There are 5,760 ways to arrange the books on the bookshelf.
A permutation is an ordered arrangement of objects, and it can be calculated as follows:
ⁿPₓ = n! / (n - x)!
where n is the total number of objects and r is the number of objects that we are arranging.
To determine the total number of ways in which we can arrange the books on a bookshelf, we need to first calculate the total number of possible arrangements. We can do this by using the fundamental principle of counting, which tells us that the total number of possible arrangements is equal to the product of the number of ways in which each book can be arranged.
Therefore, the total number of possible arrangements can be calculated as follows:
Total number of possible arrangements = Number of ways to arrange math books × Number of ways to arrange history books × Number of ways to arrange science books
In our case, we have 4 math books, 5 history books, and 2 science books, so we can calculate the number of permutations for each type of book as follows:
Number of ways to arrange math books = ⁴P₄ = 4! / (4-4)! = 4! / 0! = 24
Number of ways to arrange history books = ⁵P₅ = 5! / (5-5)! = 5! / 0! = 120
Number of ways to arrange science books = ²P₂ = 2! / (2-2)! = 2! / 0! = 2
Now, we can substitute these values in the formula for the total number of possible arrangements:
Total number of possible arrangements = 24 × 120 × 2 = 5,760
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How is rational algebraic expressions different with fractions? How is it the same
The difference between rational algebraic expressions and fractions is discussed above.
What are algebraic expressions?In mathematics, an expression or mathematical expression is a combination of terms, both variables and constants.
For example → 2x + 3y + z
Given is to explain how is rational algebraic expressions different with fractions.
In a rational algebraic expressions, the expression function in the numerator and denominator both are non - zero polynomials. A fraction is of the form {x/y}, in which it is not necessary that {x} and {y} should be polynomials only. They can be numbers also.
Therefore, the difference between rational algebraic expressions and fractions is discussed above.
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THE FIRST 2 PEOPLE TO ANSWER GET POINTS AND ONLY ONE OF THEM GETS BRAINLIETS FOR THE BEST ANSWER
Answer: 157.5
To find the volume of the smaller box, we use this equation:
Base × Length × HeightFitting the dimensions into the equation:
[tex]8\frac{3}{4}[/tex] × 3 × 10 = 262.5So, the volume of the smaller box is 262.5³.
If the height of the second box is %60 percent bigger, we can use this equation to figure out the new height.
10 × 1.6 = 16
Why do we multiply by 1.6 instead of 0.6?Well, that's a good question! If we were to multiply by 0.6, the box would get smaller, instead of bigger. We add the 1.0 because we have to add the original height, not just the added height.
Now, the equation looks like this:
[tex]8\frac{3}{4}[/tex] × 3 × 16 = 420Now, the second boxes volume is 420³.
To find out the difference between the two volumes, we can subtract.
420 - 262.5 = 157.5Therefore, the difference between the two volumes is 157.5.
A baker uses the equation y=12x to predict the revenue generated from selling x cakes she uses equation y=450+4.5x to model the cost to produce x cakes.
The complete question:
A baker uses the equation y = 12x to predict the revenue generated from selling a cakes. She uses equation y= 450 +4.5x to
model the cost to produce a cakes:
What does (60, 720), the solution of the system -450 +4.5x &
y=12x represent?
Solution:-
The solution of the system (-450 + 4.5x, y = 12x) at (60, 720) represents :
a. The point where the revenue generated from selling 60 cakes is 720 dollars
b. The cost to produce those 60 cakes is 720 dollars.
What is a system of equations?In geometry, A system of equations is a collection of two or more equations with the same set of unknown variables. In solving a system of equations, we try to calculate values for each of the unknowns that will satisfy each and every equation in the system.
The given system of equations is:
y = 12x (equation 1)
y = 450 + 4.5x (equation 2)
where x represents the number of cakes produced and sold, y represents the revenue generated from selling x cakes, and 450 + 4.5x represents the cost to produce x cakes.
To find the solution of the system, we can substitute equation 1 into equation 2, and solve for x as follows:
12x = 450 + 4.5x
7.5x = 450
x = 60
Substituting this value of x into equation 1 gives us:
y = 12(60)
y = 720
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i need help
schoology
The measure of the missing angle α is 62 degrees.
What is the measure of the missing angle?The sum of angles on the straight line adds up to 180 degrees.
From the diagram;
Angle 1 = 28°Angle 2 = 90°Angle 3 = αValue of α = ?Since the sum of angles on a straight line adds up to 180 degrees.
Angle 1 + Angle 2 + Angle 3 = 180
Plug in the values
118 + α = 180
Subtract 118 from both sides
118 - 118 + α = 180 - 118
α = 180 - 118
α = 62°
Therefore, the value of angle α is 62 degrees.
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if 3 is subtracted to a number and the sum is multiplied by 5 the number thus obtained is 575 find the original number
Answer:
(X-3)5=575
5x-15=575
5x=575+15
5x=590
X= 590:5
X= 118
The start of a quadratic sequence is shown
below.
What is the nth term rule for the sequence?
-5, -2, 3, 10, 19,
Answer:
nth term = n²-6
Step-by-step explanation:
we know our nth-term formula is going to be of the form an² + bn + c. We just have to find a, b, and c.
In this series,
-5, -2, 3, 10, 19....
a=1, b=0, c=-6
nth term = n²-6
if n=1 then,
nth term=1²-6
⇒nth term=-5
Select the correct answer from each drop-down menu.
-6 -5 -4 -3 -2
m
w
4
5 6
The degree of the polynomial function represented by the graph is
and its leading coefficient is
Reset
Next
The degree of the polynomial function represented by the graph is 4 and its leading coefficient is negative
How to complete the blanksFrom the question, we have the following parameters that can be used in our computation:
The graph
The degree of the polynomial function is the number of times the curve tends to touch or intersect with the graph
In this case, we have
Degree = 4
For the leading coefficient, we have
leading coefficient = negative
This is because the graph opens down
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Bookwork code: A99
Calculator
not allowed
The table below shows the masses of some oranges in a crate.
If one of the oranges is chosen at random from the crate, what is the probability
that it has a mass of more than 80 g?
Give your answer as a fraction in its simplest form.
The probability that the orange has a mass of more than 80g is (y/x).
What is a probability? Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true.The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty.Given is that one of the oranges is chosen at random from the crate of oranges.
Assume that the total number of oranges are {x} and the oranges with a mass of greater than 80 are {y}. So, we can write -
P{E} = y/x
Therefore, the probability that the orange has a mass of more than 80g is (y/x).
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Need help with this for school
Answer: 135
Step-by-step explanation:
Counting by 5 The last point at the end of the box and whisker plot is 135
Pls show your work thank you will mark the Brainliest
The graph that best models the exponential function is given as follows:
Graph A.
How to define the exponential function?An exponential function is defined as follows:
y = a(b)^x.
In which:
a is the value of y when x = 0.b is the rate of change.The parameters for this problem are given as follows:
a = 200,000 -> initial value of the home -> when t = 0, y = 200,000.b = 1.06 -> value increases by 6% each year.Hence the function is given as follows:
y = 200000(1.06)^x.
The value of the home after 5 years is given as follows:
y = 200000(1.06)^5
y = $267,645.
Which is best approximated by the Graph A.
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Raito tables green blue
12 16
Blank 4
36 Blank
The ratio tables based on the information will be:
12 16
3 4
36 48
How to calculate the valuesRatio in Mathematics simply demonstrates how many times one number can be able to fit into another number. It should be noted that ratios contrast two numbers by dividing them. In this case, A/B will be the formula if one is comparing one variable (A) to another variable (B).
This simply indicates that you're dividing the variable A by B. Let us say for instance, the ratio will be 3/10 if A is 3 and B is 10.
Since the ratio is 3:4. When the smaller number is 36, the larger number will be:
= 4/3 × 36.
= 48
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How do you do this problem? can you show me how to do it? I am struggling on this
The values and graph of the equation 3x - 2y = 6 is attached below while the slope is 3/2
What is equation of lineThe equation of a straight line can be represented in various forms. One of the most commonly used forms is the point-slope form, which is represented as:
y - y1 = m (x - x1)
where (x1, y1) is a point on the line, and m is the slope of the line, which is the rate of change of y with respect to x.
Another common form of the equation of a line is the slope-intercept form, which is represented as:
y = mx + b
where m is the slope of the line, and b is the y-intercept, which is the point where the line crosses the y-axis.
In this problem, we need to write the table of values and the find the slope of the line.
3x - 2y = 6
rewriting this equation;
2y = 3x - 6
y = 3x/2 - 3
when y = 0
0 = 3x/2 - 3
3x/2 = 3
3x = 2 * 3
3x = 6
x = 2
when x = 0
y = 3(0)/2 - 3
y = 0 - 3
y = -3
The slope of the line can be calculated using the two points from above.
slope (m) = y₂ - y₁ / x₂ - x₁
m = -3 - 0 / 0 - 2
m = 3/2
The slope is 3/2
The graph of the equation is attached below
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i need help to understand and get this answer
Answer:
6
Step-by-step explanation:
12 is the full length. point E marks 1/2 of the line. 12-6=6
if it's asking the length of d-e, then the answer is (6) because the entire length of line is twelve and in the top line e-f in 6 and 6-12=6
Несколько футбольных болельщиков соседнего дома выписывают журнал “Наш футбол”, часть жителей этого дома выписывают известный автомобильный журнал “Top Gear”, а часть тот, и тот журнал. Сколько жителей соседнего дома выписывают оба журнала, если на “Наш Футбол” подписано 64 процента, а на “Top Gear” – 84 процента?
Answer:
48 residents
Step-by-step explanation:
Let's assume that there are 100 residents in the neighboring house. 64% of the residents subscribe to "Our Football" magazine, so there are 64 residents who subscribe to it. 84% of the residents subscribe to "Top Gear" magazine, so there are 84 residents who subscribe to it. The number of residents who subscribe to both magazines can be calculated by finding the intersection of the two sets, which is equal to the number of residents who belong to both sets. This can be found using the formula:
Number of residents subscribing to both magazines = 100 - (100 - 64) - (100 - 84)
= 100 - 36 - 16
= 48
Therefore, 48 residents of the neighboring house subscribe to both magazines.
the financial services call center in problem 2.44 also monitors call duration, which is the amount of time spent speaking to customers on the phone. the file callduration contains the following data for time, in seconds, spent by agents talking to 50 customers. 243 290 199 240 125 151 158 66 350 1141 251 385 239 139 181 111 136 250 313 154 78 264 123 314 135 99 420 112 239 208 65 133 213 229 154 377 69 170 261 230 273 288 180 296 235 243 167 227 384 331 a. construct a percentage histogram and a percentage polygon. b. construct a cumulative percentage polygon. c. what can you conclude about call center performance if a call duration target of less than 240 seconds is set?
a) The histogram of the data is illustrated below.
b) A cumulative percentage polygon is illustrated on histogram.
c) The cumulative percentage polygon shows us that approximately 66% of calls fall below 240 seconds.
Histograms are a way of representing data visually by dividing it into intervals or bins and plotting the frequency of data points in each bin. In this problem, we will be constructing a percentage histogram and polygon to analyze call duration data.
The call duration data is provided in seconds for 50 customers. To construct a percentage histogram, we need to first determine the bin size or interval. One way to do this is to use the square root rule, which states that the number of bins should be approximately equal to the square root of the sample size. In our case, the sample size is 50, so we can round the square root to 7 and use 7 bins.
Next, we need to determine the range of the data and set the limits for each bin. The range of the data is from 65 to 1141 seconds. We can set the limits for each bin as follows: 60-180, 181-300, 301-420, 421-540, 541-660, 661-780, 781-900, and 901-1020.
To construct the percentage histogram, we need to divide the frequency in each bin by the total sample size and multiply by 100. This gives us the percentage of data points in each bin. We can then plot these percentages as bars of equal width for each bin.
The percentage polygon is constructed by connecting the midpoints of the tops of each bar in the histogram with straight lines. This creates a polygon that represents the distribution of data in the histogram.
In this problem, we are asked to analyze call center performance if a call duration target of less than 240 seconds is set. From the percentage histogram and polygon, we can see that the majority of calls fall within the first three bins, which correspond to call durations of 60-180, 181-300, and 301-420 seconds. Only a small percentage of calls exceed 420 seconds.
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please help solve it
The statement that describes the conversion is To find the weight in pounds, multiply the number of ounce by the unit rate 16 ounces per pound
How to complete the statement that describes the conversionFrom the question, we have the following parameters that can be used in our computation:
The double number line
On the double number line, we have:
16 ounces = 1 pound
This means that
To find the weight in pounds, multiply the number of ounce by the unit rate 16 ounces per pound
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The width of a rectangle is the length minus 8 units. The area of the rectangle is 9 square units. What is the length, in units, of the rectangle?
Answer: The length is 9 units and the width is 1 unit
Step-by-step explanation:
We can use the formula for the area of a rectangle to solve this problem. The formula is A = l * w, where A is the area, l is the length, and w is the width.
We have A = 9, and we know that w = l - 8. Substituting this into the formula, we get:
9 = l * (l - 8)
We can rearrange this to solve for l:
9 = l^2 - 8l
Adding 8l to both sides of the equation, we get:
9 + 8l = l^2
Subtracting 9 from both sides, we get:
8l = l^2 - 9
We can factor this to get:
l(l - 9) = 0
Since the product of two numbers is zero only when one of them is zero, we can set each factor equal to zero and solve:
l = 0 or l - 9 = 0
Adding 9 to both sides of the second equation, we get:
l = 9
Therefore, the length of the rectangle is 9 units.
Solve the equation by completing
the square.
x²8x + 16 = 0
Answer:
x = 4 twice.
Step-by-step explanation:
x^2-8x+ 16=0
Bring the constant to the other side.
x^2-8x=-16
Half the coefficient of x and square the result. Add to both sides.
x^2-8x+[-8/2]^2=-16+(-8/2)^2
x^2-8x+16= 16-16
x^2-8x+16=0
Now, whenever there's a perfect square constant, take the root of that constant. Since the coeff. of x is negative (-8),
(x-4)(x-4)=0 [-4^2=16 and -4+(-4)=-8]
Therefore, x-4=0 twice.
x=4 twice.
Hope this helps! :]
What is the area of this compound figure?
Answer:
(24) + (20) + (8) = 52 ft^2
Step-by-step explanation:
This figure is a compound of 3 rectangles that can be split up like in my attached picture.
The top, horizontal rectangle is 8x3 = 24 sq ft.
The bottom, almost square rectangle is 4x5 = 20 sq ft.
The middle rectangle has a height of 4 feet and a width of (8-6) = 2 feet.
So, its area is 4x2= 8 sq ft.
The compound figure is the sum of all of these areas:
24 + 20 + 8 = 52
The area of the compound figure is 52 sq ft.
Area of 1 = 8 * 3 = 24
Area of 2 = 4 * 2 = 8
Area of 3 = 5 * 4 = 20
Total area = 24 + 8 + 20 = 52
The function V(r) = ²³
can be used to find the volume of air inside a basketball given its radius. What does V(r)
represent?
The function V(r) is representing the volume of basketball when the radius is r.
What is volume?Volume is defined as the space occupied within the boundaries of an object in three-dimensional space. It is also known as the capacity of the object.
Given that, the function V(r) = 4/3 πr³, can be used to find the volume of air inside a basketball given its radius (r).
We are asked to find that what does V(r) represents,
Here, V(r) is the function's output is r is the input, the only variable in the formula is r, that means the volume totally depends on the radius of the basket ball. & volume is changes with the radius.
Thus, this function represents the volume of the basketball when radius is r.
Hence, the function V(r) is representing the volume of basketball when the radius is r.
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2. The diagram shows a wall where the two shaded parts are painted in yellow. 20 m 12 m 16 m 15 m 0.1 litre of paint is required to paint an area of 1 m². What is the volume, in litres, of yellow paint required to paint the two shaded parts?
Answer: The two shaded parts of the wall have a combined area of 20m * 12m + 16m * 15m = 240 + 240 = 480 square meters.
Therefore, the volume of yellow paint required is 480 * 0.1 = 48 litres.
Step-by-step explanation:
what number is not a factor of 12 is smaller than 10 is one less than perfect square
List of perfect squares smaller than 10 are: {1, 4, 9}
Subtract 1 from each value to get a new list of {0, 3, 8}
None of these new values are a factor of 12.
The possible answers are: 0, 3, and 8
Please help (will mark as brainlest)
Answer:
1)10abc^2+6a^2bc
2)6.6x^2yz-2.8xy^2z+0.5xyz^2
Step-by-step explanation:
HELP ASAP I NEED THIS QUESTION RIGHT PLEASEEEEE
The tables/graphs with their equations are
Table (a): y = 3x - 5Table (b): y = -12x + 2Graph (c): y = 5/4x - 5Graph (d): y = -6x + 3How to match the tables and graphs with their equationsFrom the question, we have the following parameters that can be used in our computation:
Tables, Graphs and equations
Table (a)
Here, we notice that:
The output is the 5 less than three times the input
This is represented as
y = 3x - 5
Table (b)
Here, we notice that:
The output is the 2 more than negative 12 times the input
This is represented as
y = -12x + 2
Graph (c)
Here, we have the following points
(4, 0) and (0, -5)
A linear function is represented as
y = mx + c
Where
c = y when x = 0
So, we have
y = mx - 5
Using the other point, we have
0 = 4m - 5
This gives
m = 5/4
So, we have
y = 5/4x - 5
Graph (d)
Here, we have the following points
(0.5, 0) and (0, 3)
A linear function is represented as
y = mx + c
Where
c = y when x = 0
So, we have
y = mx + 3
Using the other point, we have
0 = 0.5m + 3
This gives
m = -6
So, we have
y = -6x + 3
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I believe this is the first question I ask on here and I need help urgently. Does anyone have an answer? This is a question for "Geometry Checkpoint 3 - Part 2" .
Check the picture below.
so the figure is really just a semi-circle, a rectangle and three triangles, let's simply get their area and sum them all up.
[tex]\stackrel{ \textit{\LARGE Areas} }{\stackrel{ semicircle }{\cfrac{1}{2}\pi (2)^2}~~ + ~~\stackrel{ rectangle }{(4)(5)}~~ + ~~\stackrel{ triangle }{\cfrac{1}{2}(\underset{b}{3})(\underset{h}{2})}~~ + ~~\stackrel{ triangle }{\cfrac{1}{2}(\underset{b}{4})(\underset{h}{1})}~~ + ~~\stackrel{ triangle }{\cfrac{1}{2}(\underset{b}{4})(\underset{h}{2})}} \\\\\\ 2\pi ~~ + ~~20~~ + ~~3~~ + ~~2~~ + ~~4 ~~ \approx ~~ \text{\LARGE 35.28}[/tex]
a poker hand consists of ive cards drawn from a standard 52-card deck. find the expected number of aces in a poker hand given that the irst card drawn is an ace.
The expected number of aces in a poker hand given that the first card drawn is an ace is 0.235.
If the first card drawn is an ace, then there are only 3 aces left in the deck of 51 cards from which to draw the remaining 4 cards. Therefore, we can model the number of aces in the poker hand as a binomial random variable with parameters n = 4 (the number of cards after the first ace) and p = 3/51 (the probability of drawing an ace from the remaining deck).
The expected number of aces in a poker hand given that the first card drawn is an ace can be calculated as follows:
E(X) = np = 4 * 3/51 = 12/51 = 0.235
Therefore, the expected number of aces in a poker hand given that the first card drawn is an ace is approximately 0.235.
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____ The given question is incorrect, the correct question is given below:
A poker hand consists of five cards drawn from a standard 52-card deck. find the expected number of aces in a poker hand given that the first card drawn is an ace.
Which best describes the graph of y≥-x² +8x-2?
The vertex is at (4, -14) The parabola is a solid line that opens down. Shading is above the line.
The vertex is at (4, 14). The parabola is a solid line that opens down. Shading is above the parabola.
The vertex is at (-4,-14). The parabola is a dotted line that opens down. Shading is below the parabola.
O The vertex is at (-4, 14). The parabola is a solid line that opens down. Shading is below the parabola.
A statement which best describes the graph of y ≥ -x² + 8x - 2 include the following: B. The vertex is at (4, 14). The parabola is a solid line that opens down. Shading is above the parabola.
How to determine the true statements about this quadratic function?Generally speaking, the graph of a quadratic function would always form a parabolic curve because it is a u-shaped. For this quadratic function, we can logically deduce that the graph is a downward parabola because the coefficient of x² is negative and the value of "a" is less than zero (0).
By critically observing the graph of the given quadratic function, we can logically deduce that the solutions (roots) and vertex are as follows;
x = 0.258, y = 0.
x = 7.742, y = 0.
Vertex = (4, 14).
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Can you please help me with 11, 12,13 and 14 please it will mean a lot
first one is a
Step-by-step explanation:
