Question

ch 8 to assess the opinion of students at the ohio state university about campus safety, a reporter for the student newspaper interviews 15 students she meets walking on the campus late at night who are willing to give their opinion. the sample obtained is
a probability sample of students with night classes.
a simple random sample of students feeling safe.
a stratified random sample of students feeling safe.
probably biased.

question 7
1 pts
ch 8* you are using the table of random digits to choose a simple random sample of six students from a class of 30 students. you label the students 01 to 30 in alphabetical order, and then select a simple random sample. which of the following is a possible sample that could be obtained?
04, 18, 07, 13, 02, 07
45, 74, 04, 18, 07, 65
04, 18, 07, 13, 02, 05

Explanation:

First Question (Campus Safety Survey)

The reporter interviews students walking on campus late at night who are willing to give their opinion. This is a convenience sample (only those available and willing at night), which is likely biased because it doesn't represent all students (e.g., day students, those not on campus late, or those unwilling to share are excluded). The other options are incorrect: it's not a probability sample (no random selection), not a simple random sample (no random process), and not a stratified sample (no stratification).

For a simple random sample of students labeled 01 - 30, sample numbers must be between 01 - 30, and no repeats (since each student is unique). The first option has a repeat (07 twice), the second has numbers >30 (45, 74, 65), and the third has unique numbers between 01 - 30.

Answer:

probably biased.

Question 7 (Simple Random Sample with Random Digits)