Educational Technology Inc. sells software to provide guided homework problems for a statistics course. The company would
Question:
Educational Technology Inc. sells software to provide guided homework problems for a statistics course. The company would like to know if students who use the software score better on exams. A sample of students who used the software had the following exam scores: 86, 78, 66, 83, 84, 81, 84, 109, 65, and 102. Students who did not use the software had the following exam scores: 91, 71, 75, 76, 87, 79, 73, 76, 79, 78, 87, 90, 76, and 72. Assume the population standard deviations are not the same. At the .10 significance level, can we conclude that there is a difference in the mean exam scores for the two groups of students?
a. What are the null and alternate hypotheses?
b. Compute the test statistic.
c. Compute the p-value.
d. What is your decision regarding the null hypothesis?
e. Interpret the result.
Step by Step Answer:
Statistical Techniques In Business And Economics
ISBN: 9781260239478
18th Edition
Authors: Douglas Lind, William Marchal, Samuel Wathen