Question

Of the 6500 students enrolled at a community col- lege, 3000 are part time and the other 3500 are full time. The college can provide a list of students that is sorted so that all full-time students are listed first, followed by the part-time students. a. Select a stratified random sample that uses full-time and part-time students as the two strata and that includes 10 students from each stratum. Describe the procedure you used to select the sample, and identify the students in- cluded in your sample by placement on the sorted list. b. Does every student at this community college have the same chance of being selected for inclusion in the sample?

Answer 1

You just select a random sample from the first 3500 and a random sample from the 3501 to the 6500.

The part time students have the most probability to get selected.

Explanation:

In order to select a random sample from the 6500 students and you want 10 from both of the part time and full time students, you just select at random from 1 to 3500 to select 10 random students that are full time, and then you just have to select a random sample from the 3501 to the 6500 numbers on the list, obvisuly since there are more full time students in the least they will have less probability to get selected.