A Methods and Measurements Analyst for Digital Devices Needs to Develop

question 56

Multiple Choice

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 employees perform this task six times with the following results: How many observations should be made if she wants to be 0.8664 confident that the maximum error in the observed time is 0.5 second? Assume that the standard deviation of the task time is 4 seconds.

• A)10
• B)12
• C)120
• D)144
• E)169

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Definitions:

Mean, Median, Mode

Central tendency measures in statistics: Mean is the average, median is the middle value when data is ordered, and mode is the most frequently occurring value.

Median

The midpoint of a set of scores.

Mean and Median

Statistical terms where mean refers to the average of a set of numbers, and median is the middle value when these numbers are arranged in order.

Measure of Central Tendency

A statistical measure that represents the center point or typical value of a dataset, commonly identified via the mean, median, or mode.