Suppose you want to know whether a training program that your company (an automo

Question

Suppose you want to know whether a training program that your company (an automobile manufacturer) has introduced recently in one of the plants has had any effect on worker mistakes. To test this, you decide to gather data for the plant that received the training and four other plants. The data you gather are monthly reports of the total number of mistakes made by workers during that month in each plant. Which of the following tests should be performed, given only this information? O A z-test for population proportion O An F-test for difference in means O A z-test for the difference in means O A paired sample t-test for difference in means A z-test for the mean O At-test for the mean O An independent samples t-test for difference in means (unequal variances) O A chi-squared test for variance O A z-test for difference in proportions O An independent samples t-test for difference in means (equal varia O An F-test for difference in variances

Explanation / Answer

Ans:

For above data,F test for difference in means will be conduct,to check if mean number of mistakes for plant for which plant is significantly different from others.

We will calculate first mean and standard deviation of number of mistakes for each plant for conduct F test,to check if there is significant difference in means between each plant.Then post hoc test will be done to check which plant is significantly different from others.

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