Question

Which of these is an example of a non-random sample?

A.
Out of all the seventh grade students in a public school district, fifteen are chosen to win a trip to a vacation destination.

B.
Airline passengers to Orlando, Florida, are asked about vacation plans.

C.
At a school assembly, five students are randomly chosen to receive free admission to a theme park.

D.
Registered voters in Arizona are surveyed to determine if they have relatives in Florida.

Answer 1

it is b

Explanation:

Random sampling is where each member of the sample is randomly selected from the population. Conversely, a non-random sample is where the selection of a member from a sample is not random because the sample population is not random.

The only situation which shows a non-random sample is airline passengers to Orlando, Florida, are asked about vacation plans.

Answer 2

The answer is C, because it is the only group of samples that is not biased, as A only includes 7th graders, B only includes Orlando tourists, and D only includes people in Arizona.