Math Solutions

[See Steps] A manufacturer of transistors claims that its transistors will last an average of 1000 hours. To maintain this average, 25 transistors are tested

Question: A manufacturer of transistors claims that its transistors will last an average of 1000 hours. To maintain this average, 25 transistors are tested each month. If the computed value of t lies between t and t , the manufacturer is satisfied with his claim

What conclusions should he drawn from a sample that has a mean X = 1010 and a standard deviation s = 60 ? Assume the distribution of the lifetime of the transistors is normal.

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