SOLUTION: The mean television viewing time for teens is 3 hours per day. Assume = 3 and population standard deviation is = 1.2 hours. Suppose a sample of 50 teens will be used to monitor t

Algebra ->  Probability-and-statistics -> SOLUTION: The mean television viewing time for teens is 3 hours per day. Assume = 3 and population standard deviation is = 1.2 hours. Suppose a sample of 50 teens will be used to monitor t      Log On


   

Question 860727: The mean television viewing time for teens is 3 hours per day. Assume = 3 and population standard deviation is = 1.2 hours. Suppose a sample of 50 teens will be used to monitor television viewing time. Let denote the sample mean viewing time. What is the probability the sample mean will be within 0.25 hours of the population mean?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

P(z+=+.25%2F1.2%2Fsqrt%2850%29)= P( -1.4706≤ z ≤1.4706)  = .9293-.0707 = .8586