Suppose the North Carolina University system tests the idea that computerization of statistics classes increases student performance
Question:
Suppose the North Carolina University system tests the idea that computerization of statistics classes increases student performance in the courses. If the computers are found to have a beneficial effect, the school will spend twenty million to computerize all statistics classrooms. The population mean statistics GPA presently is believed to be 2.35, with a standard deviation of 1.25. A sample is taken of 100 students who took experimental computerized statistics classes. Their sample GPA in the stat classes was 2.45. Test the idea that computerization increases student GPA, setting a level of significance of .01.
A. What is the null and alternative hypothesis
B. What is/are the criterion values?
C. What is the decision regarding the null hypothesis?
D. Write the conclusion in a single sentence (In your answer, address whether the school should computerize the classrooms.)
E. Would the conclusion be different if we’d used a 0.05 alpha level? Explain why or why not.
Essentials Of Business Statistics
ISBN: 9780078020537
5th Edition
Authors: Bruce Bowerman, Richard Connell, Emily Murphree, Burdeane Or