Over the entire six years that students attend an Ohio elementary school,they are absent,on average,28 days due to influenza.Assume that the standard deviation over this time period is days.Upon graduation from elementary school,a random sample of 36 students is taken and asked how many days of school they missed due to influenza. Refer to Exhibit 7-1.What is the expected value for the sampling distribution of the number of school days missed due to influenza?
A)6
B)9
C)28
D)168

Question

Over the entire six years that students attend an Ohio elementary school,they are absent,on average,28 days due to influenza.Assume that the standard deviation over this time period is  days.Upon graduation from elementary school,a random sample of 36 students is taken and asked how many days of school they missed due to influenza. Refer to Exhibit 7-1.What is the expected value for the sampling distribution of the number of school days missed due to influenza?
A)6 
B)9 
C)28 
D)168

Quizplus · Accepted Answer

The expected value for the sampling distribution of the number of school days missed due to influenza can be calculated using the formula: E(X) = μ = 28 days (the population mean). Since the sample size is 36, the expected value for the sampling distribution is same as the population mean, which is 28 days. Therefore, the correct answer is C.

Over the Entire Six Years That Students Attend an Ohio