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8 May, 17:51

In the past, the mean running time for a certain type of radio battery has been 9.6 hours. The manufacturer has introduced a change in the production method and wants to perform a hypothesis test to determine whether the mean running time has changed as a result.

A. H0: µ > 9.6 hours Ha: µ > 9.6 hours

B. H0: µ = 9.6 hours Ha: µ > 9.6 hours

C. H0: µ ≠ 9.6 hours Ha: µ = 9.6 hours

D. H0: µ = 9.6 hours Ha: µ ≠ 9.6 hours

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  1. 8 May, 17:57
    0
    the answer is B, correct answer
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