Write a paper on Variable types and data for variables are presented and accurate. Population of interest for the study is presented and accurate. Sample is presented and accurate. Page citation for sample information is provided. Sampling method is presented and accurate. The means of data collection are presented and accurate. Page citation for sample information is provided. The writer is clearly in command of standard, written, academic English. the first one is POPULATION AND SAMPLING distributionS and second one is CLINICAL inquiry AND HYPOTHESIS TESTING