A Time Study Analyst Has Found the Select Time for a Work

question 106

Multiple Choice

A time study analyst has found the select time for a work element to be 14.0 minutes, with a sample standard deviation of 3.2 minutes. What is the minimum sample size needed if the estimate is to be within 4 percent of the average 95 percent of the time (z = 1.96) ?

• A) fewer than 100
• B) greater than or equal to 100 but fewer than 140
• C) greater than or equal to 140 but fewer than 180
• D) greater than or equal to 180

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