Question

A manufacturer of cell phone batteries claims that the median life of a battery is more than 40 hours. Suppose a random sample of 75 batteries finds that 32 have a life of more than 40 hours. State the null hypothesis to test the claim. Assume that the population of all battery lives is not normally distributed.
A. H0: Md 40
B. H0: Md 40
C. H0: Md > 40
D. H0: Md 40

Answer

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