Analytics to Infer Population Characteristics and Differences

Analytics to infer population characteristics and segment differences rely on samples. Samples are collected and analyzed to efficiently estimate population characteristics. Inference from samples enables tests of hypotheses about what may be true in the population. Those hypotheses are tested and population parameters are estimated with confidence intervals. Included in this chapter are tests of hypotheses and confidence intervals forInference relies on the properties of Normally distributed sample means. Those properties of Normal distributions are explored first, below.