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Standard normal random variables

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Let Z be a standard normal random variable. Calculate the following probabilities and round your responses to at least three decimal places.

P (Z > - 0.64) =
P (Z ≤(less than or equal to) - 1.39) =
P (1.38 < Z < 2.07) =

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Solution Summary

This solution calculates various probabilities, explaining the steps. It provides a link to a standard normal distribution table.

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In order to answer these questions we need to make use of a standard normal distribution table. You can find one in most Statistics books and on the Internet. Here's a link to one:

http://www.math.unb.ca/~knight/utility/NormTble.htm

This table in particular tells us the probability that a standard normal random variable is less than a given value. That is, it tells us P( Z < x) where x is any value and Z is ...

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