HELP ASAP PLEASE: Carter wants to see if his grades average to an A average....

Question

iwanttogotostanford · Answer

@alexwee123 @zepdrix

iwanttogotostanford · Answer

i got C but not sure

iwanttogotostanford · Answer

anyone? I think it is C but again not entirely sure

directrix · Answer

For sure, she did not use a random sample.

The next question is whether she used an observational study or conducted an experiment.

directrix · Answer

Observational Study Like experiments, observational studies attempt to understand cause-and-effect relationships. However, unlike experiments, the researcher is not able to control (1) how subjects are assigned to groups and/or (2) which treatments each group receives. For example, a sample survey, does not apply a treatment to survey respondents. The researcher only observes survey responses. Therefore, a sample survey is an example of an observational study. http://stattrek.com/statistics/dictionary.aspx?definition=observational_study

directrix · Answer

@iwanttogotostanford 

>>anyone? I think it is C but again not entirely sure

I agree with option C.

iwanttogotostanford · Answer

@Directrix thank you so much

directrix · Answer

You are welcome.