A Methods and Measurement Analyst Wants to Develop a Time

question 71

Multiple Choice

A methods and measurement analyst wants to develop a time standard for a certain task. In a preliminary study, he observed one worker perform the task six times with an average observed time of 20 seconds and a standard deviation of 2 seconds.
How many observations should be made if he wants to be 95.44 percent confident that the maximum error in the observed time is 1 second?

• A)3
• B)4
• C)13.3
• D)16
• E)25

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