Question: I'm trying to solve a math problem that goes as such.. A sample of n = 25 taxi drivers was selected at random to draw

I'm trying to solve a math problem that goes as such..

A sample of n = 25 taxi drivers was selected at random to draw conclusions about their average daily wages. Individual records are assumed to be independent normally distributed with population standard deviation = 16. Sample summaries were found as

Mean = X = 74.2 and Sample SD = s = 20

1. At signicance level = 5%, is there sucient evidence to conclude that the population average is below 80? Show critical value, test statistic, and state the rejection rule that explains your decision

how do I solve this using Z?

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