A Doctor at a Local Hospital Is Interested in Estimating

question 54

Multiple Choice

A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must sheselect if she desires to be 90% confident that her estimate is within 2 ounces of the true mean? Assume that s =5 ounces based on earlier studies.

• A) 17
• B) 16
• C) 5
• D) 4

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Definitions:

STDEV.S(data range)

A statistical function that calculates the standard deviation for a sample set of data, measuring how much data points deviate from the mean.

STDEV.P(data range)

The standard deviation of a population, calculated using the exact data range, which quantifies the dispersion of data points.

MODE.SNGL(data range)

An Excel function that returns the most frequently occurring value in a data range.

MEDIAN(data range)

A statistical measure that represents the middle value in a given set of numbers when they are arranged in order.