(Answered) : Statistics Question 274

Question Description

Hello I need assistance with these questions, showing work unnecessary just answers for multiple choice practice quiz

1) Elwin Osbourne, CIO at GFS, Inc., is studying employee use of GFS e-mail for non-business communications. He plans to use a 95% confidence interval estimate of the proportion of e-mail messages that are non-business; he will accept a 0.05 error. Previous studies indicate that approximately 30% of employee e-mail is not business related. Elwin should sample _______ e-mail messages.

2) Life tests performed on a sample of 13 batteries of a new model indicated: (1) an average life of 75 months,