Question

practice 1b score: 9/50 answered: 8/25 question 9 two statistics students at ucla conducted an energy - efficiency survey of graduate student apartments. there were seven university apartment buildings, and the students randomly selected three to be included in the study; in each building, they randomly chose 25 apartments. what is the largest group of students that the study results represent? all ucla graduate student apartments. all ucla graduate student apartments in this group of seven buildings. all ucla graduate student apartments in the three sampled buildings. all ucla graduate student apartments that were sampled in the three buildings.

Explanation:

The students randomly selected three out of seven university apartment - buildings and then 25 apartments from those buildings. The sample is taken from these seven buildings. So the results represent all UCLA graduate student apartments in this group of seven buildings. The sample is not from all UCLA graduate student apartments (ruling out the first option), not just from the three sampled buildings (ruling out the third option), and not just the sampled apartments in the three buildings (ruling out the fourth option) as the results can be generalized to the whole group of buildings from which the sample was drawn.

Answer:

All UCLA graduate student apartments in this group of seven buildings.