Question

A section manager wishes to estimate the average number of seconds required by a worker to complete a particular task. A random sample of 20 observations of the task reveals that average number of seconds required to complete the task was 100 seconds with a standard deviation of 10 seconds. Assume that the number of seconds required to do the job on all occasions is normally distributed.

Which method would be most appropriate for analyzing these data?

Group of answer choices

One-sample mean, z-interval

One-sample proportion interval

One-sample mean, t-interval

Two-sample mean, dependent samples interval

Two-sample mean, independent samples interval

Regression Analysis

Answer 1

and