The proportion of people with IQs above 130 is 2.3%.
<h3>How to calculate the value?</h3>
Normal distribution, is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.
Here the mean is 100 and a standard deviation of 15.
µ = 100, σ = 15
P(X > 130) =
= P( (X-µ)/σ > (130-100)/15)
= P(z > 2)
= 1 - P(z < 2)
Using excel function:
= 1 - NORM.S.DIST(2, 1)
= 0.023 = 2.3%
The value is 2.3%.
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Answer:
Skewed Left
Step-by-step explanation:
The shape of the sampling distribution of -x will match the shape of the parent population since the sample size is small (n=4<30, although it will be closer to normal than the parent population is.
Answer:
y=-3+2x
Step-by-step explanation:
Overall, move 6x to the right and then solve from there :).
First you woyld find how many hours total he worked.
![5 \times 8 = 40](https://tex.z-dn.net/?f=5%20%5Ctimes%208%20%3D%2040)
Then take the number of hours and multiply by the pay earned per hour.
![40 \times 9 = 360](https://tex.z-dn.net/?f=40%20%5Ctimes%209%20%3D%20360)
They would make $360 per week.
Answer:
y = 1/4x-1
Step-by-step explanation:
The slope intercept form of a line is
y = mx+b
m is the slope and b is the y intercept
but we do not know the slope y know the x intercept
(4,0 )
and the y intercept
( 0,-1)
We can calculate the slope using these points
m = (y2-y1)/ (x2-x1)
= (-1-0)/(0-4)
= -1/-4
= 1/4
Now we can put the slope = 1/4 and the y intercept =-1 into the formula
y = 1/4x-1