which question is incomplete

4. The BIG BURGER regional manager wishes to determine how long people are waiting in the drive through at the Statesboro BIG BURGER. He gives the following data. I took a random sample of 36 cars and found the average length of time spent waiting was 8 minutes with standard deviation of 14 minutes.

What is the confidence interval for the true mean time customers spend waiting in the drive through. (alpha = .1).

A._____________________ to

B._____________________ is the

C._____________________ confidence interval for

D.________________________

5.In a random sample of 70 professors 60 responded that they believed students needed more quantitative skills. What is the 90% confidence interval for the true population proportion of professors that believe students need more quantitative skills?

A._____________________ to

B._____________________ is the

C._____________________ confidence interval for

D._____________________

E. Can you conclude with 90% confidence that the majority of professors believe students need more quantitative skills?_______ yes/no

8.In a random sample of 81 orders from e-commercials the sample mean order is $55 with a sample standard deviation of $24.Estimate the 90% confidence interval for the true population mean order?

A)Upper Limit _____________________

B)Lower Limit _____________________