A Hypothesis Regarding the Weight of Newborn Infants at a Community

question 14

Multiple Choice

A hypothesis regarding the weight of newborn infants at a community hospital is that the mean is 6.6 pounds. A sample of seven infants is randomly selected and their weights at birth are recorded as 9.0,7.3,6.0,8.8,6.8,8.4,and 6.6 pounds. What is the sample standard deviation?

• A)1.177
• B)1.188
• C)1.386
• D)1.090

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Definitions:

Shaded Area

In graphical representations, the region covered by a pattern or color to emphasize or illustrate specific data areas or values.

Distribution

Describes the way values of a variable or set of data are spread or distributed across possible values or intervals.

Z-score

A measure that indicates how many standard deviations an element is from the mean of its distribution.

Hypothesized Population Mean

The expected average value across a population, based on a hypothesis.