Do graduate students ride the bus the same amount they did last year at this time? A sample of individuals was taken and the following scores were obtained for the number of bus rides this year: 6, 4, 5, 4, 4, 10. Last year the population mean was 13.5 and the population standard deviation was 2.

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