In algebra, one of the most important concepts is Finding values of a normally distributed random variable.
A standard normal random variable is a normally distributed random variable with mean μ = 0 and standard deviation σ = 1. It will always be denoted by the letter Z. The density function for
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Using a table of values for the standard normal distribution, we find that . P (–1 . Thus, there is a 0.6826 probability that the random variable will take on a value within one standard deviation of the mean