4. An analyst has become familiar with a job and has divided it into four elements. The element times for the first four cycles are given in the table below with a performance rating for each element.

a. On the basis of the times observed through four cycles, determine the normal time for the job.

b. How many observations would be required to estimate the true time for element |
within 10 percent with 90 percent confidence?

Transcribed Image Text:

PERFORMANCE ELEMENT CYCLE I CYCLE 1 CYCLE 3 CYCLE 4 RATING (PERCENT) 1234 1.38 1.58 1.71 1.49 100 0.29 0.35 0.30 0.38 120 0.61 0.58 0.53 0.57 105 0.77 0.82 0.74 0.88 90