Describe how representative the sample is of the population of interest or how proportional it is to the larger population if non-probability sampling is used (external validity)

Describe how representative the sample is of the population of interest or how proportional it is to the larger population if non-probability sampling is used (external validity)

Review briefly the purpose, research questions, and hypotheses. Preview the organization of chapter 4. Pilot Study (if applicable) Concisely report the results of the pilot study. Report any impact of the pilot study on the main study (for example, changes in instrumentation, data analysis strategies, etc.). Data Collection Describe the time frame for data collection as well as actual recruitment and response rates. Present any discrepancies in data collection from the plan presented in chapter 3. Report baseline descriptive and demographic characteristics of the sample Describe how representative the sample is of the population of interest or how proportional it is to the larger population if non-probability sampling is used (external validity). Provide results of basic univariate analyses that justify inclusion of covariates in the model, if applicable.