A group of researchers who were interested in understanding the political attitudes and behavior of all college students in the U.S. Remember

that they had decided to conduct a study on the Columbia University campus, with 180 randomly selected Columbia students and ask them to answer a total of 25 questions in this

survey. These researchers tell you that they were able to conduct the survey with a 180-student sample after having asked 600 students and being turned down by 420 of them.

A) Is this sample still random? Do you consider any constraint of this sample?

B) Does it still meet the simple random simpling assumtion?

C) what are the conditions to apply central limit theorem?

D) Do you think that the Central Limit Theorem still applies to this sample? Why/Why not? How could the answer in part b/c impact your answer here? Explain in details and justify your arguments.

E) if you think the CLT still applies, how do you justify that the the simple random silpling is not working here and the sample is not random, which will not make CLT be useless here?