You are conducting a study to better understand the average number of times per week that Michiganders have been going grocery shopping during stay-at-home order in the month of May 2020. Assume that the standard deviation of shopping trips per week is 2.5 trips. Before you begin the study, you need to find the necessary sample size in order to have 95% confidence in your population estimates, with a margin of error of 1 trip or less. The number of Michiganders who should be sampled, given a this level of confidence and margin of error is

Suppose that you need to have 99% confidence in your population estimates, and you still need a margin of error of 1 trip or less. The number of Michiganders who should be sampled, given this level of confidence and margin of error is