Assignment : One Sample Hypothesis Testing

Use the Student.xls file for the following problems:

PRACTICE PROBLEM 1: It is pretty common across most schools to find the grades at the MBA level divided between A's and B's. As such, you expect the mean GPA to be around 3.50. Using the sample of 200 MBA students, conduct a one-sample hypothesis test to determine if the mean GPA is different from 3.50. Use a .05 significance level. Describe your findings which includes stating the hypotheses, direction of the test, p-value, decision to reject the null or not, and the conclusion.

PRACTICE PROBLEM 2: Assume you read in the Concordia website that the average age of their MBA students is 45. Is this really true or have they failed to update this correctly? You think it is far less because there have been a lot more students going straight from their Bachelors to their Masters since the economy is so bad. You took a sample of 200 students (in the data file). Conduct a one-sample hypothesis test to determine if the mean age is less than 45. Use a .05 significance level. Describe your findings which includes stating the hypotheses, direction of the test, p-value, decision to reject the null or not, and the conclusion.

PRACTICE PROBLEM 3: You have heard from idle chatter that I out of 5 students (20%) don't declare a major. You took a sample of 200 students (in the data file). Conduct a one-sample hypothesis test to determine if the proportion without a major is greater than 20%. Use a .05 significance level. Describe your findings which includes stating the hypotheses, direction of the test, p-value, decision to reject the null or not, and the conclusion.

Solutions are provided to practice problems so you can check your work.

Attachment:- Student Data.xls