Sampling issues

First introduce your chart and the contents of it in a narrative paragraph.
Fill out each aspect of the chart to identify the type of sampling plan, effectiveness, areas of concern, and plan for improvement.
Conclude with a comparison and contrast of the sampling used in the articles reviewed in a narrative paragraph. Make a case for which ones could be replicated with confidence and/or which ones need revision.
1- Sampling Plan               
2- Effectiveness of Sampling Plan               
3- Issues of Concern               
4- Ideas for Improvement

I WILL UPLOAD THE ARTICLE