1. After investigating the situation among graduate students, a sample was taken of staff to compare bus rides to a year ago. The following values were obtained 2, 4, 2, 3, 3, 6, 4, 5. Last year the population mean was 12.5.

1. Identify the hypotheses.
2. Obtain and report the test statistic. Are the differences statistically significant at the = .05 level? (5 points)
3. Provide a writeup that interpret your outcome in light of your finding.
4. Calculate a 95% confidence interval for the population mean.