Sufficient evidence to reject the manufacture claim

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Reference no: EM1389668

The manufacturer of the long-life bulbs claims that their bulbs have an average life of 2000 hrs before failure. The mean and standard deviation of 12 light bulbs randomly selected from the production line were calculated to be 1,960 and 142 hrs, respectively. Do the sample data present sufficient evidence to reject the manufacture's claim? Test using a a=0.05. What is the p-value of the test.

Reference no: EM1389668

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