Question: 5. How many observations should be recorded in determining the allowance for personal delays in a forge shop, if it is expected that a 5

5. How many observations should be recorded in determining the allowance for personal delays in a forge shop, if it is expected that a 5 percent personal allowance will suffice, and if this value is to remain between 4 and 6 percent across 95 percent of the time? 6. To get 65 percent precision on work that is estimated to take 80 percent of the workers time, how many random observations are required at the 95 percent confidence level? 7. If the average handling activity during a 10-day study is 82 percent and the number of daily observations is 48, what is the confidence interval for each days percentage activity?

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