Question: 10. A firm has a training program for a certain operation. The progress of trainees is carefully moni- tored. An established standard requires a trainee

10. A firm has a training program for a certain operation. The progress of trainees is carefully moni- tored. An established standard requires a trainee to be able to complete the sixth repetition of the operation in six hours or less. Those who are unable to do this are assigned to other jobs. Currently, three trainees have each completed two repetitions. Trainee A had times of 9 hours for the first and 8 hours for the second repetition; trainee B had times of 10 hours and 8 hours for the first and second repetitions, and trainee Chad times of 12 hours and 9 hours. QUESTION 3 Chapter 7. Problem 10 Assuming an allowance of 15 percent of job time, what is the standard time for element z based on the observations? (Please keep 3 digits after the decimal point.) QUESTION 4 Chapter 7. Problem 10 How many observations would be needed to estimate the mean time for element 2 within 1 percent of its true value with a 95.5 percent confidence? (Use Z value on page 314 table.) 45 47 O 66 68

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