Use the following scenario to answer the last set of questions using Stratification and Adjustment:

Suppose you want to design a study exploring social support on health-related quality of life (HRQOL) among students at Newyork University. Both the exposure (social support) and HRQOL are collected on continuous scales, but you always have the option of categorizing the variables.

1. You decide that you can conduct your study online, so participants can answer their questions on their own time and at their convenience. However, you still want to ensure that your data is representative of your target population. Identify a (1) sampling approach and (2) sampling frame and (3) how you would use that to recruit participants into your study.

2. Your study is a success! Now the New York school district wants you to conduct a similar study, but in kids ages 12-18 in NY schools. How might your sampling approach and sampling frame change to obtain a representative sample of this population?