Can consumer group report in next publication

Reference no: EM13124721

A tire manufacturing company advertises that its XL600 tire lasts at least 60,000 miles. From history, the company knows the standard deviation of the tire life is 8,000 miles. A consumer group has noticed more and more complaints about the tire failing at less miles so it decides to conduct a Z test at the .05 level of significance to determine whether the tires last less than 60,000 miles. The consumer group samples 49 of the tires and finds the tires have a mean of life 55,000 miles. Based on the results of the test, can the consumer group report in its next publication that the tires last less than 60,000 miles?

Reference no: EM13124721

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