At Western University the historical mean of scholarship examination scores for freshman applications is 900. A historical population standard deviation = 180 is assumed known. Each year, the assistant dean uses a sample of applications to determine whether the mean examination score for the new freshman applications has changed.

a. State the hypotheses.?H0:

Select answer from below:

Ha:

b. What is the 95% confidence interval estimate of the population mean examination score if a sample of 200 applications provided a sample mean = 935

c. Use the confidence interval to conduct a hypothesis test. Using = .05, can the assistant dean conclude that the mean examination score for the new freshman applications has changed?

d. What is the p-value (to 3 decimals)?