1) Add new section on interpretation of degrees of freedom. 2) Add new material on correlation and fitting a straight line to a set of x,y data.
boxplot; dot plot; empirical percentile; frequency distribution; histogram; kurtosis; mean; median; mid range; Ogive; order statistic; population parameter; probability plot; q-q plot; range; sample statistic; skewness; standard deviation; standard error; variance;
Citing ASTM Standards
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