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Give the ho and ha and label which is the claim

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Reference no: EM131970613

A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1000 hours. A homeowner selects 25 bulbs and finds the mean lifetime tobe 980 hours with a standard deviation of 80 hours. If a = 0.05, test the manufacturer's claim.

a) Give the Ho and Ha and label which is the claim

b) Give the pvalue

c) Give your final decision about the claim.

Reference no: EM131970613

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