Discuss the below:
Q1: Two workers on the same job show the following results over a long period of time.
Worker Worker
A B
Mean time of completing the job (minutes) 30 25
Standard deviation (minutes) 6 4
a. Which worker appears to be more consistent in the time he requires to complete the job? Explain.
b. Which worker appears to be faster in completing the job? Explain.
Q2: Suppose the manager of a plant is concerned with the total number of man-hours lost due to accidents for the past 12 months. The company statistician has reported the mean number of man-hours lost per month but did not keep a record of the total sum. Should the manager order the study repeated to obtain the desired information? Explain your answer clearly.