QUESTION 9 Based on an examination of a sample of 895 cases drawn from the General...
QUESTION 9
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Based on an examination of a sample of 895 cases drawn from the General Social Survey, you find that the mean number of hours worked last week was 41.47, with a standard deviation of 15.04.
a. What is the probability that someone in the sample worked 60 hours or more?
b. How many people worked 60 hours or more?
Homework Answers
a)
P(X >= 60) = P(z <= (60 - 41.47)/15.04)
= P(z >= 1.23)
= 1 - 0.8907
= 0.1093
b)
number of people = 895 * 0.1093 = 97.82
If rounded to interger value, no. of people are 98
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QUESTION 9
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