A human resources manager at a company found that staff sent, on average, 22 emails per day. A manager at one of the company’s branches believes that their staff, on average, send more than 22 emails per day. The branch manager asks a random sample of staff at their branch to record how many emails they sent each day.

What type of statistical test would be appropriate to investigate the branch manager’s
prediction?

What is the population we can draw conclusions about in this study?