34.4 The Shape and Spread of Data: Quantiles and Dispersion
Point 5 of 6
34.4.5 Variance and Standard Deviation
Core idea
How far each number sits from the mean, squared and then averaged, is the variance s², and its square root is the standard deviation s
Module goal. Describe a distribution from both position and variability, master quartiles, range, variance, and standard deviation, paving the way for box plots and spread comparisons
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