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Chapter 10: Q. 42 (page 653)

42. Long words Mary was interested in comparing the mean word length in articles from a medical journal and an airline’s in-flight magazine. She counted the number of letters in the first 200 words of an article in
the medical journal and in the first 100 words of an article in the airline magazine. Mary then used Minitab statistical software to produce the histograms shown.

Short Answer

Expert verified

The random requirement was not met.

Step by step solution

01

Given information

Mary counted the number of letters in the first 200 words of an article in
the medical journal and in the first 100 words of an article in the airline magazine.

02

Explanation

Determine the Random, Normal, and Independent are the requirements from the given histogram:

Random, Normal, and Independent are the requirements for two-samplet methods.
The samples of words were conveniently chosen as the first 200words, which are not representative of all words, hence the Random requirement was not met.

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