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The mean oil temperature from a discharge pipe at a jet engine should not exceed than...

The mean oil temperature from a discharge pipe at a jet engine should not exceed than 100°C. Past experience has shown that the standard deviation of temperature is 2°C. The oil temperature is measured on nine randomly chosen fights having same flight hours, and the average temperature is found to be 98°C.

What is the probability of accepting the null hypothesis at α = 0.05 if the oil has a true mean temperature of 104°C

Math   Statistics-And-Probability   
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