Each Person Who Applies for an Assembly Job at Robert's

question 116

Multiple Choice

Each person who applies for an assembly job at Robert's Electronics is given a mechanical aptitude test. One part of the test involves assembling a plug-in unit based on numbered instructions. A sample of the length of time it took 42 persons to assemble the unit was organized into the following frequency distribution. What is the standard deviation (in minutes) ?

• A) 3.89
• B) 6.01
• C) 8.78
• D) 17.00
• E) Zero

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Definitions:

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