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68-95-99.7 Rule
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68-95-99.7 Rule
Standard
Error
Pooled
Variance
Degrees of Freedom Statistics
Margin of
Error
Confidence Interval
Hypothesis Testing Statistics
Range Statistics
Mean Square
Error
Deviation Statistics
Variable Mathematics
Statistical Dispersion
Absolute Deviation
Random Variable
Moment Mathematics
Mean
Median Absolute Deviation
Binomial Distribution
Standard Score
Standard Deviation
15:15
Khan Academy
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Standard error of the mean
Take a sample from a population, calculate the mean of that sample, put everything back, and do it over and over. How much do those sample means tend to vary from the "average" sample mean? This is what the standard error of the mean measures. Its longer name is the standard deviation of the sampling distribution of the sample mean.
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