Question

The mean water temperature downstream from a power plant cooling tower discharge pipe should be no more than 1000F. Past experience has indicated that the standard devi- ation of temperature is 20F. The water temperature is measured on nine randomly chosen days, and the average temperature is found to be 980F. (z0.05 = ±1.96) (a) Should the water temperature be judged acceptable with α = 0.05? (b) What is the probability of accepting the null hypothesis at α = 0.05 if the water has a true mean temperature of 1040F

Answer 1

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