A Supermarket Administrator Suspects That Idle Time Is About 20

question 57

Multiple Choice

A supermarket administrator suspects that idle time is about 20 percent for the cashier and 15 percent for the office clerk.If the administrator wants a 95 percent confidence level and a degree of precision of + 0.05 for both cashier and office clerk,how many TOTAL observations are needed?

• A) Fewer than or equal to 200
• B) Greater than 200 but fewer than or equal to 300
• C) Greater than 300 but fewer than or equal to 400
• D) Greater than 400

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Definitions:

Mode

The value or values that occur most frequently in a data set.

Skewed

A term describing a distribution that is asymmetric, leaning towards one side, either to the left or right, indicating a deviation from the normal distribution.

Sample Mean

The average value calculated from a sample, used as an estimate of the population mean.

Extroverted

A personality characteristic marked by the ability to be social, engage in conversation easily, show confidence, and exhibit a strong capacity for expressing emotions.