Posted by M.C on Sunday, May 6, 2012 at 12:14am.
To determine how many hours per week freshmen college students watch television, a random sample of 225 students was selected. It was determined that the students in the sample spent an average of 35 hours watching TV per week. The population standard deviation is known to be 12 hours. Provide a 95% confidence interval estimate for the average number of hours that all college freshmen spend watching TV per week

statistics  PsyDAG, Sunday, May 6, 2012 at 3:36am
95% = mean ± 1.96 SEm
SEm = SD/√n
Insert values and calculate.