Question

A researcher posts a newspaper advertisement offering $10 in exchange for participation in a short study. The researcher accepts the first 10 people who respond to the advertisement. Which of the following statements is true about the sample?

It is not a valid sample because it is only a short study.
It is a valid sample because money is offered to participants.
It is a valid sample because the first 10 people were selected to participate.
It is not a valid sample because it is not a random sample of the population.

Answer 1

Am i right with D?

Answer 2

@az

Answer 3

you there @az

Answer 4

i think you are right

Answer 5

I agree

the people are volunteering themselves because they're interested in probably that $10

It's not against research studies to compensate people for their times but volunteer bias is a thing. You could make it more randomized by choosing randomly from the people who volunteer instead of the first 10

Answer 6

Thank you

Answer 7

You're welcome!