ETrain Corporation designs employee training software for th

E-Train Corporation designs employee training software for the oil industry. It is investigating three different designs for a new training program, with the goal of choosing the one that helps people best learn new concepts, as measured by a test on the new material. As a first step, the company wants to see if there is a difference in the average improvement from a pre-test (given before training) to a post-test (given after training) among the three designs. The company will use ANOVA to determine this.

Three random samples of people with similar employment experience in the oil industry were chosen and given a pre-test and a post-test on the material. The company will compare the mean percentage change from pre-test to post-test for each design. The results of running the ANOVA are shown below.

Which of the following represents the correct statement of the ANOVA null and alternative hypotheses?

Solution

The Null and Alternative hypotheses for the given problem ( you\'ve not given statements)

Null hypothesis: The means are equal. There is no significance difference in means of different trained and untrained groups

Alternative hypothesis: Atleast one group mean significantly differs from the other group means.