Use the t-distribution and the sample results to complete the test of the hypotheses. Use a 5% significance level. Assume the results come from a random sample, and if the sample size is small, assume the underlying distribution is relatively normal.
Test null hypothesis: u=15 vs alternative hypothesis: u>15 using the sample results x with a line above = 17.2, s=6.4 with n=40.
t-statistic = ?
p-value = ?
What is the conclusion? Reject or do not reject?