STA2212E: A factory manager wishes to investigate whether a new processing methods is effective in reducing: Analytics For Business, Individual Assignment, TP, Singapore

Question 2

A factory manager wishes to investigate whether a new processing methods is effective in reducing the time taken by the workers to complete a task. He randomly chose 10 workers to try the new processing methods. The table below shows the time taken by the 10 workers to complete the same task using the old and new processing methods.

Assume that the time taken to complete the task is normally distributed. Test whether the new processing method is effective in reducing the time taken to complete the task by the workers at 5% significance level.