Assume that the readings of inexpensive thermometers for thetempaerature of the

Question

Assume that the readings of inexpensive thermometers for thetempaerature of the freezing point of water have a mean of 0degrees C and standard deviation of 1 degree C. Find the indicated probability where z is a reading in degreesCelsius. P(2>-3.2) choose from the following: a) 0.4223,    b) 0.9993,     c) 0.0007 ,    d) 0.4997 Assume that the readings of inexpensive thermometers for thetempaerature of the freezing point of water have a mean of 0degrees C and standard deviation of 1 degree C. Find the indicated probability where z is a reading in degreesCelsius. P(2>-3.2) choose from the following: a) 0.4223,    b) 0.9993,     c) 0.0007 ,    d) 0.4997

Explanation / Answer

Given that the readings of inexpensive thermometers for thetempaerature of the freezing point of water have a mean of 0degrees C and standard deviation of 1 degree C. i.e. StandardNormal distribution. ==> P{Z > -3.2} = 1 - P{Z -3.2}                            = 1 - 0.0007        [usingNormal tables]                            = 0.9993   So option (b) is correct.

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