A sample of 16 sales receipts from a grocery store shows the
mean of $50 and the standard deviation of $4. Use these values to
test whether or not the mean of sales would be less than $52 with
10% significance level.
– step 1: state the null and alternative hypotheses
– step 2: state decision rulw for critical value methods
– step 3: find test statistic
– step 4: conclusion