Suppose It Is Desired to Estimate the Average Time a Customer

question 70

Multiple Choice

Suppose it is desired to estimate the average time a customer spends in a particular store to within 5 minutes (e.g., + 5 minutes) at 97% reliability. It is estimated that the standard deviation of the times is 15 minutes. How large a sample should be taken to get the desired interval?

• A) n = 6.51
• B) n = 150
• C) n = 43
• D) n = 7

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Definitions:

Immunities

Refers to the ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells.

Emic

An approach that investigates cultures from the inside, understanding phenomena through the meanings and definitions that are relevant to people from the culture being studied.

Etic

An approach that studies cultures from an outsider's perspective, emphasizing universals and comparative analysis.

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Originating from within an organism, tissue, or cell, not influenced by external factors.