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# Wilcoxon-Signed Rank Test

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Wilcoxon-Signed Rank Test
The 1997 price/earnings ratios for a sample of 12 stocks are shown in the following list ( Barron's, December 8, 1997). Assume that a financial analyst has provided the estimated price/earnings ratio for 1998. Using a .05 level of significance, what is your conclusion about the differences between the price/earnings ratios for 1997 and 1998?

COMPANY 1997 P/E RATIO 1998 P/E RATIO
Coca-Cola 40 32
Du Pont 24 22
Eastman Kodak 21 23
General Electric 30 23
General Mills 25 19
IBM 19 19
McDonalds 20 17
Merck 29 19
Motorola 35 20
Philip Morris 17 18
Walt Disney 33 27
Xerox 20 16

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Wilcoxon-Signed Rank Test
The 1997 price/earnings ratios for a sample of 12 stocks are shown in the following list ( Barron's, December 8, 1997). Assume that a financial analyst has provided the estimated price/earnings ratio for 1998. Using a .05 level of significance, what is your conclusion about the differences between the price/earnings ratios for 1997 and 1998?

COMPANY 1997 P/E RATIO 1998 P/E RATIO
Coca-Cola 40 32
Du Pont 24 22
Eastman Kodak 21 23
General Electric 30 23
General Mills 25 19
IBM 19 19
McDonalds 20 17
Merck 29 19
Motorola 35 20
Philip Morris 17 18
Walt Disney 33 27
Xerox 20 16

##### Measures of Central Tendency

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##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.