Another sample of n = 25 waiters 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 and Sample SD = s = 20 1. At significance level = 1%, is there sufficient evidence to conclude that the population average is below 80? Show critical value, test statistic, and state the rejection rule that explains your decision 2. At significance level = 5%, is there evidence to conclude that the population average differs from 80? Show critical value, test statistic, and state the rejection rule that explains your decision.

1. Another sample of n = 25 waiters 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 and
Sample SD = s = 20
1. At significance level = 1%, is there sufficient evidence to conclude that the population
average is below 80? Show critical value, test statistic, and state the rejection rule that explains
your decision
2. At significance level = 5%, is there evidence to conclude that the population average differs
from 80? Show critical value, test statistic, and state the rejection rule that explains your decision