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Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard de
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Solution

find : P(Z > 1.811) =?

Note: P(Z >a) = 1 - P(Z <a

1- P(Z <1.811)

Refer Z-table to find the probability or use excel formula "=NORM.S.DIST(1.811, TRUE)" to find the probability.

+1 -0.9649

合0.0351

:PZ >1.811) = 0.0351

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