Answer:
a) 0.7734
Step-by-step explanation:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean
and standard deviation
, the zscore of a measure X is given by:
![Z = \frac{X - \mu}{\sigma}](https://tex.z-dn.net/?f=Z%20%3D%20%5Cfrac%7BX%20-%20%5Cmu%7D%7B%5Csigma%7D)
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this question, we have that:
![\mu = 101, \sigma = 24](https://tex.z-dn.net/?f=%5Cmu%20%3D%20101%2C%20%5Csigma%20%3D%2024)
(a) what proportion of children aged 13 to 15 years old have scores on this test above 83 ?
This is 1 subtracted by the pvalue of Z when X = 83. So
![Z = \frac{X - \mu}{\sigma}](https://tex.z-dn.net/?f=Z%20%3D%20%5Cfrac%7BX%20-%20%5Cmu%7D%7B%5Csigma%7D)
![Z = \frac{83 - 101}{24}](https://tex.z-dn.net/?f=Z%20%3D%20%5Cfrac%7B83%20-%20101%7D%7B24%7D)
![Z = -0.75](https://tex.z-dn.net/?f=Z%20%3D%20-0.75)
has a pvalue of 0.2266
1 - 0.2266 = 0.7734
The answer is 0.7734
Answer:
none of these equal 40 with x=10.8
The coordinate of the hive is the point of interaction of the two lines.
We have the two equations:
Here, Equation would be: 3.2x = 48
Where, x = 1 cm for certain distance in real
x = 48/3.2
x= 15
In short, Your Answer would be 15 Feet
[ Other Screenshot question has been answered ]
Hope this helps!
Answer: did you get the answer??????
Step-by-step explanation: