Empirical Rule and z-score Probability

Empirical Rule and z-score Probability

Empirical Rule TheĀ Empirical RuleĀ applies to a normal, bell-shaped curve which is symmetrical about the mean. It states that within one standard deviation of the mean (both left-side and right-side) there is about 68% of the data; within two standard deviations of the...
Finite Population Correction factor

Finite Population Correction factor

The Finite Population Correction Factor, sometimes just called the FPC factor, is used when the sample size is large relative to the population size. For most situations, the population is so large, typical sample sizes are far too small to worry about the need for...