Question

Classmates suggest conducting the following sampling techniques to test various claims. Determine whether the sample will be random. If not, suggest an alternative.

1. Survey all the students you have class with and ask about the average time they spend daily on different activities.

2. Randomly select former students from a list of recent graduates and ask whether they are employed.

3. Randomly select students from a directory, ask how much debt money they borrowed to pay for college this year, and multiply by four. Please explain your answer in detail.

Answer 1

a) Survey all the students you have class with and ask about the average time they spend daily on different activities

Here we take the all students from class so sample is not randomly selected. for random selection we can take a Random sample of students from the class of size n.

b) Randomly select former students from a list of recent graduates and ask whether they are employed.

As stated sample is randomly selected from the list of recent graduates students.

c) Randomly select students from a directory, ask how much debt money they borrowed to pay for college this year, and multiply by four.

As stated sample is randomly selected of students from a directory.