Complete question :
The random variable x represents the number of tests that a patient entering a hospital will have along with the corresponding probabilities. Find the mean and standard deviation.
x 0 1 2 3 4
P(x) 3/17 5/17 6/17 2/17 1/17
Answer:
1.59 ; 1.09
Step-by-step explanation:
The Mean :
E(X) = Σx*p(x)
(0*3/17) + (1 * 5/17) + (2*6/17) + (3*2/17) + (4*1/17)
= 1.58823
= 1.59
Standard deviation = sqrt(Var(x))
Var(X) = Σx²*p(x) - E(x)²
= {(0^2*3/17) + (1^2 * 5/17) + (2^2*6/17) + (3^2*2/17) + (4^2*1/17)} - 1.59^2
= 3.7058823 - 2.5281
= 1.1777823
Standard deviation = sqrt(1.1777823)
= 1.0852567
= 1.09
please help me with math
At A local department store suits have been reduced to $36 this price is 90% off the original Price for suits given this what was the original price of the suits
Answer:
if 90% = $36
100%= ?
100%×$36
90%
3600 = $40
90
Step-by-step explanation:
you use the method of cross multiplying
1) a -4 - b; use a = 6, and b = 1
Answer:
-23
Step-by-step explanation:
6×-4 -1.... (6)(-4)-1
-24-1.....-24-1
-23
A grocery store plans to use 75% of its area for food and beverages. If the grocery store has an area of 1,600 m², what is the area used for all the other items?
A.400 m²
B.600 m²
C.1,200 m²
D.1,240 m²
Answer:
It's either 400 or 1,200.
Step-by-step explanation:
Other people are saying 400, I got 1,200 by multiplying 1,600 to 0.75 which gave me that answer. I do not know how other people got 400.
Which fraction is the largest
Answer:
a
Step-by-step explanation:
because it will cut it into two parts and that will appear bigger then others
Find the mean absolute deviation of 5,9,7,0,3,5,5
Answer: 1.92
Step-by-step explanation:
Formula to find the mean absolute deviation:
[tex]MAD =\sum^{n=i}_{n=1}\dfrac{|x_i-\overlien{x}|}{n}[/tex]
, where [tex]\overline{x}=[/tex] mean , [tex]x_i's[/tex] = data values, n= number of data values.
Given data: 5,9,7,0,3,5,5
n= 7
Mean:
[tex]\overline{x}=\dfrac{5+9+7+0+3+5+5}{7}\\\\=\dfrac{34}{7}[/tex]
MAD = [tex]\dfrac {|5-\dfrac{34}{7}|+|9-\dfrac{34}{7}|+|7-\frac{34}{7}|+|0-\dfrac{34}{7}|+|3-\dfrac{34}{7}|+|5-\dfrac{34}{7}|+|5-\dfrac{34}{7}|}{7}[/tex]
[tex]=\dfrac{\frac17+\frac{29}{7}+\frac{15}{7}+\frac{34}{7}+\dfrac{13}{7}+\frac17+\frac17}{7}\\\\=\dfrac{\frac{94}{7}}{7}\\\\=\dfrac{94}{49}\approx1.92[/tex]
Hence, the mean absolute deviation of 5,9,7,0,3,5,5 is 1.92(approx)
The radius of a circle is 3 millimeters. What is the circle's area? r=3 mm Use 3.14 for . square millimeters
2 + 2 + 2 + 2 + 2 + 2 = 4 × ___
Answer:
2 + 2 + 2 + 2 + 2 + 2 = 4 × 3
Step-by-step explanation:
The data below represents the relationship between the number of incidences of UFO sightings in late 1930s and early 1940s. Draw a scatter plot for the data. Year of Incidence 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 Number of Incidences (percent) 0.9 0.8 0.8 1.3 1.4 1.2 1.7 1.8 1.6 1.5 1.5
Answer:
Kindly check attached picture
Step-by-step explanation:
Given the data:
Year of Incidence 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946
Number of Incidences (percent) 0.9 0.8 0.8 1.3 1.4 1.2 1.7 1.8 1.6 1.5 1.5
The year of incidences were represented as 1 to 11 for each consecutive year. WITH YEAR on the x and number of incidences on the y. Axis.
Answer:
A ;
This is the picture in case it may be labelled a different letter!
☆
EDGE2023 Good Luck :3
Suppose y varies directly with x. If y = 4 when x = 0.4, what is y when x is 5?
Step-by-step explanation:
y = kx, where k is a real constant.
When x = 0.4, y = 4.
=> (4) = (0.4)k, k = 10.
Hence when x = 5,
y = kx = (10)(5) = 50.
The answer is 50.
Liam puts $900 in a savings account at an annual interest rate of 3%, If Liam does not withdraw
or deposit any money, what is the interest that Liam will earn at the end of six months?
Answer:
Step-by-step explanation:
Liam has bank with 3% yearly
900*3/100=27 dollars he would earn in 1 year
in six months, 27/2=13.50 interest earn
Given m||n, find the value of x.
+
(7x-7)°
m
(6x+11)°
Answer:
x = 18
Step-by-step explanation:
[tex](7x - 7) \degree = (6x + 11) \degree \\ (exterior \: alternate \: \angle s) \\ \\ 7x - 7 = 6x + 11 \\ \\ 7x - 6x = 11 + 7 \\ \\ x = 18[/tex]
Write an expression for the perimeter of a square of side 5y
Pls help due ASAP
Show workings
Answer:
66 degrees
Step-by-step explanation:
angle M=angle P
so:
15x-18=13x-8
reducing:
2x=10
x=5
angles M & P each are 57 degrees
180-57-57=angle L
66 degrees
Write an expression that best describes the following The product of N and M equals to 1000 N = 4^2 and M = 10^-7
Answer:
i am not sure but 26
Step-by-step explanation:
Helppp I NEED THIS DONE RN
Answer:
C
Step-by-step explanation:
How to solve real number arithmetic
Answer/Step-by-step explanation
1. When adding real numbers with the same sign the sum will have the same sign as the numbers added.
2. When adding real numbers with different signs you subtract the lesser absolute value from the greater one. The sum will then have the same sign as the number with the greater absolute value.
3. There are a couple of properties of addition:
The additive commutative property tells us that the order in which you add the numbers does not change the sum.
4. And the additive associative property tells us that it also that the order in which we group three or more numbers does not affect the sum.
5. The additive identity property tells us that the sum of a number and 0 is always the number.
6. And the additive inverse property tells us that if you add a number with its opposite you will always get 0
true or false: All substances have the same density
Answer:
False
Step-by-step explanation:
They just don't :)
Answer:
False
Step-by-step explanation:
Trust me
Please help me!!!!! Geometry work!!!
Answer:
number 7:Sometimes We can have two acute angles, 20 and 30, 20+30=50, which is still acute, We can have two acute angles, 45 and 45, 45+45=90, which is neither acute nor obtuse. We can have two acute angles, 80 and 80, 80+80=160, which is obtuse.acute angles are less than 90 degrees. However, they can sometimes equal obtuse angles. For example, two acute angles measures of 70 degrees and 30 degrees are both acute. Add them together they equal 100 degrees, which is obtuse. some examples: 40° and 30° are acute angles 40° + 30° = 70°, which is an acute angle 60° and 30° are acute angles 60° + 30° = 90°, which is a right angle 50° and 70° are acute angles 50° + 70° = 120°, which is an obtuse angle.
number 8 :Since the intercepted arc LN is the diameter of the circle, its measure is 180 degrees, so m<LMN = 90
Conclusion: the sum of two acute angles is sometimes an acute angle.
2+5 x 2
O and I have to many points that why im making one up
so you guys can be SMART and a lot of you are k bye
Answer:
14
Step-by-step explanation:
Please Help Really Appreciated!!
For a ride, a taxi driver charges an initial fare of $3.00 plus $2.00 for each 1 mile driven. If the total charge for a ride is $27.00, what is the distance traveled, in miles?
Answer:
12 Miles
Step-by-step explanation:
27 - 3 = 24
24 ÷ 2 = 12
Which number is a solution of the inequality x <-4? Use the number line to help answer the question.
++++
-9 8 7 6 5 4 -3 -2 -1 0 1
-5
-3
2.
Answer:
0 is the answer
Step-by-step explanation:
Answer:
It is 0 i did -3 and got a 0% on the answer so yeah have a good one
In other words its 0
5,4,16/5 find the 10th term
the sequence is 25/4(4/5)^x
plug in 10 for x to get your solution:
25/4(4/5)^10=4^9/5^8
What is the system of equation y = 3x + 5
Step-by-step explanation:
slope
=
−
3
and y-intercept
=
−
5
Explanation:
the equation of a line in
slope-intercept form
is.
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
∣
∣
∣
2
2
y
=
m
x
+
b
2
2
∣
∣
∣
−−−−−−−−−−−−−−−
where m is the slope and b the y-intercept
y
=
−
3
x
−
5
is in this form
⇒
slope
=
m
=
−
3
and y-intercept
=
b
=
−
5
HElp HElp HElp HELP HELP HELP
1. coefficient
2. constant
3. variable
4. equation
5. inequality
6. two - step
-- let me know if you have any questions regarding this.
Please answer ASAP I need to answer this question quickly I just need the answer
Answer:
the answer is 6
hope it helps
The amount of flour that the bakery used this month was a 40% increase relative to last month. The bakery used 75 pounds of flour last month. How much
flour did the bakery use this month?
Answer: 11%
Step-by-step explanation:
so, I’m not going anywhere else to go to the store and I’ll let you know if you need anything or do I need to get something for dinner lol you know what I’m going through and I can’t even imagine what you mean by that time and you have have to do that for you too but I’m just trying to get you to do that that I don’t want to do with that and that I’m going to be a pain and I’m sorry I don’t want you to think that you have been in the hospital and you have no desire for me to come in this week I don’t think I can do anything with your dad and you are just not being mean and I can’t even talk to you and I’m not going through all that I know I don’t know what to do but you are not going through all this nonsense I know that I know what I want you do not need me but you know me I love that I don’t know if I will ever do that anymore but you are not even in my mind for a while but you are not so much and I’m sorry I just want to make sure that I have no idea that I’m going to have to be a friend of my best relationshi.
Harry and Gary have a total of 300 stickers.
The ratio of the number of stickers Harry has to the ratio of the number
of stickers Gary has is in the ratio 7: 3
Harry gives Gary some stickers.
The ratio of the number of stickers Harry has to the ratio of the number
of stickers Gary has is now in the ratio 8: 7
Work out how many stickers Harry gives to Gary.
You must show all your working
Answer:
Stickers given by Harry = 50
Step-by-step explanation:
Given that:
Number of stickers = 300
Ratio of Harry's stickers to Gary's stickers = 7:3
Let,
x be the number of times.
7x+3x= 300
10x = 300
Dividing both sides by 10
[tex]\frac{10x}{10}=\frac{300}{10}\\x=30[/tex]
Harry's stickers = 7(30) = 210
Gary's stickers = 3(30) = 90
New ratio of Harry's stickers to Gary's stickers = 8 : 7
8x + 7x = 300
15x = 300
Dividing both sides by 15
[tex]\frac{15x}{15}=\frac{300}{15}\\x=20[/tex]
Harry's new number of stickers = 8(20) = 160
Gary's new number of stickers = 7(20) = 140
Stickers given by Harry = 210 - 160 = 50
Hence,
Stickers given by Harry = 50
what is x equal to ? 7x+3=2x-4
[tex]7x +3 = 2x - 4 \\ 7x - 2x = - 4 - 3 \\ 5x = - 7 \\ x = \frac{ - 7}{5} \longrightarrow - \frac{7}{5} [/tex]
Answer Check by substituting the value of x in the equation.[tex]7 ( - \frac{7}{5} )+ 3 = 2( - \frac{7}{5} ) - 4 \\ - \frac{49}{5} + 3 = - \frac{14}{5} - 4 \\ - \frac{49}{5} + \frac{15}{5} = - \frac{14}{5} - \frac{20}{5} \\ - \frac{34}{5} = - \frac{34}{5} [/tex]
The equation is true for the value of x. Therefore the answer is x = -7/5
Answer[tex] \large \boxed{x = - \frac{7}{5} }[/tex]
