the average public high school has 468 students with a standard deviation of 87. a. If a public school is selected, what is the probability that the number of students enrolled is greater than 400
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Given : average public high school has 468 students with a standard deviation of 87.
a public school is selected
To Find : the probability that the number of students enrolled is greater than 400
Solution:
Mean = 468
SD = 87
Z score = ( Value - Mean)/SD
Value = 400
=> Z = (400 - 468)/87
=> Z = -0.7816
0.217
probability that the number of students enrolled is greater than 400
= 1 - 0.217
= 0.783
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