Variability
explanation of, 55, 71
numerical measures of, 65–68
Variables. See also Random variables
Variance. See also Population variances
for binomial random variable, 189
confidence interval for population, 289–292
of random variable, 175–176
sample, 66
symbols for, 67
Venn, John, 119
Venn diagrams
explanation of, 118
use of, 131, 167
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