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May 26, 2015

Homework Help: statistics

Posted by jericho on Tuesday, October 2, 2012 at 7:28am.

a manufacturer of bicycle tire has developed a new system which he claims an average life span of 5 years. with the standard deviation of 1.2 years a dealer product claims that the average life span of 150 samples is only 3.5 years. test the difference of population and sample means at 5% level of significance. what is the answer?

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