Question

Assume that the readings at freezing on a batch of thermometers are approximately Normally distributed with a mean of 0°C and a standard deviation of 1.00°C. Find the proportion of thermometers with a reading greater than -1.22°C.

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Answer 1

Solution :- Using standard normal table, u=0 6 = 1 PC z > -1-22) =1-P (Z <-1:22) =1 - 0.1112 = 0.8888 Area = 0.8888 WH -2 1 2 3