Research Question: Is the average number of people who visit the ER every day increasing?

It is known the average number of people who visit the ER is 145.

A sample is collected of 20 hospitals.The average number of people who came to the ERs per day was 162, with a sample standard deviation of 45.

Conduct a hypothesis test based on the research question presented.Using an alpha of .05

a) Reject the null hypothesis

b) Fail to reject the alternative hypothesis

c) Reject the alternative hypothesis

d) Fail to reject the null hypothesis