State whether there is preference to the brands of components.

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Chapter 16, Problem 27CE

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State whether there is preference to the brands of components.

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Cornwall and Hudson, a large retail department store, wants to handle just one brand of MP3 player. The list has been narrowed to two brands: Sony and Panasonic. To help make a decision, a panel of 16 audio experts met. A music track using the Sony player was played. Then the same track was played using the Panasonic player. A “+” in the following table indicates an individual’s preference for the Sony player, a “−” indicates preference for the Panasonic player, and a 0 signifies no preference. Expert 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 + − + − + + − 0 − + − + + − + − Conduct a test of hypothesis at the .10 significance level to determine whether there is a difference in preference between the two brands.

Cornwall and Hudson, a large retail department store, wants to handle just one brand of MP3 player. The list has been narrowed to two brands: Sony and Panasonic. To help make a decision, a panel of 16 audio experts met. A music track using the Sony player was played. Then the same track was played using the Panasonic player. A "+" in the following table indicates an individual's preference for the Sony player, a "-" indicates preference for the Panasonic player, and a 0 signifies no preference. Exper t 8 9 + + + 0 + + + Conduct a test of hypothesis at the .10 significance level to determine whether there is a difference in preference between the two brands 1 2 3 4 5 6 + 7 10 11 12 13 14 I 15 + 16

A magazine ran a survey about a web site for downloading music. Readers could register their responses on the magazine's web site. Identify what is wrong.