Question: MC Qu. 124 A methods and measurements analyst for... A methods and measurements analyst for Digital Devices needs to develop a time standard for the

MC Qu. 124 A methods and measurements analyst

MC Qu. 124 A methods and measurements analyst for... A methods and measurements analyst for Digital Devices needs to develop a time standard for the task of assembling a computer mouse. In a preliminary study, she observed one of her workers perform this task six times with the following results: Observation Time (Seconds) 1 1 46 2 2 3 3 38 40 4 4 5 6 34 4240 How many observations should be made if she wants to be 86.64 percent confident that the maximum error in the observed time is 5 second? Assume that the standard deviation of the task time is four seconds

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