Statistics (2). Please Help!

Question

Twelve different video games showing substance use were observed and the duration times of game play? (in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. Use the data to construct a a 99?% confidence interval estimate of μ?, the mean duration of game play.
4039
3881
3859
4020
4317
4813
4647
4033
5001
4817
4335
4319
What is the confidence interval estimate of the population mean μ??

Answer 1

Check out the following web sites:

 

http://www.kean.edu/~fosborne/bstat/06amean.html

 

and

 

https://onlinecourses.science.psu.edu/stat200/node/49

 

Both of these WEB sites show examples of how to get an answer.

 

Best to you.

Answer 2

Were you able to calculate the mean and standard deviation of this sample?