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Scenario: Two companies are selling batteries for MP^(4) players. Company A claims an average battery life of 12 hours while company B advertises an average

Scenario: Two companies are selling batteries for MP^(4) players. Company A claims an average battery life of 12 hours while company B advertises an average of 14 hours. Suppose the standard deviation are 1.5 hours for A and 1 hour for B.

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