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Answer to Question #33321 in Statistics and Probability for anita

Question #33321
The cost of a daily newspaper varies from city to city. However, the variation among prices
remains steady with a standard deviation of 6¢. A study was done to test the claim that the
average cost of a daily newspaper is 35¢. Twelve costs yield an average cost of 30¢ with a standard
deviation of 4¢. Do the data support the claim at the 1% level?
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