A Previous Analysis of Paper Boxes Showed That the The Standard

question 21

Multiple Choice

A previous analysis of paper boxes showed that the the standard deviation of their lengths is 13 millimeters. A packer wishes to find the 95% confidence interval for the
Average length of a box. How many boxes does he need to measure to be accurate within
4 millimeters?

• A) 29
• B) 58
• C) 41
• D) 11

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Definitions:

Quadrupled

Increased by four times in quantity or value.

Virtually

In essence or effect, though not in actual fact; almost or nearly.

Prenatal Factors

Environmental and genetic influences that affect the development of the fetus during pregnancy.

Temperament

The aspects of an individual's personality, such as introversion or extroversion, that are believed to be innate rather than learned.