a) My research question is "Does social media like facebook, reddit and so on affects grades of college students.
b) The population of interest is "all college students".
c) For this, i can use convenience sampling. I can go to some schools to collect data. I cannot do random sampling because i have only limited resources and convenience sampling is the best possible sampling for me.
d) Study is observational study because we cannot randomly assign students to social media group and without social media group. We merely observe/ask students about their previous grade, number of hours they spend on social media and current grades.
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