Sample size determination is the mathematical estimation of the number of population units considering for the study.

Data collection is a science, not an art form. Be sure to use rigor and thought before assembling the data that you seek to analyze.

Data Sampling is the selection of statistical samples from the population to estimate the characteristics of entire population.

Point estimate and Interval estimates are the two forms of population parameter estimation based on sample data.

A check Sheet is a data collection tool that usually identifies where and how often problems appear in a product or service.