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19 Nov 2021
Given information
About what percent of the values from a normal distribution lie within two standard deviations (left and right) of the mean of that distribution?
Step-by-step explanation
Step 1.
A normal distribution is a continuous variable with pdf in statistics.
Where: is the mean of the distribution and is the standard deviation; notation . If the random variable is called the standard normal distribution.
In a normal distribution, the -score indicates how many standard deviations a given number is above or below the mean. The -negative score's value indicates that the value is below the mean, while the positive value indicates that it is above the mean.
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