Question

Check my answer please!! ASAP :)

A representative for Mrs. Jones Donuts stood outside of a grocery store with a clipboard, a survey form, and a table filled with donuts and small glasses of milk. The sign on the table said "FREE DONUTS." After each person picked up a donut and took a bite, she would ask, "Isn't that good?" Each positive reply, even if it was just a nod of the head, was entered on her clipboard sheet as a preference for that kind of donut.

What kind of sampling is this?

biased sampling
negative sampling
random sampling
unbiased sampling

Answer 1

I say B

Answer 2

yup.. absolutely correct..!
you can check further on
http://www.southalabama.edu/coe/bset/johnson/lectures/lec7.htm

Answer 3

it says its wrong :(

Answer 4

Why would that be "negative sampling?"

@lee_actress: Please justify your answer there.

I looked up http://www.southalabama.edu/coe/bset/johnson/lectures/lec7.htm, found one mention of "negative case" sampling, but did not find it at all relevant to the problem at hand.

Answer 5

it was biased

Answer 6

Certainly there was a lot of bias in that sampling, but "bias" is not the same thing as "negative sampling." "bias" can be positive as well as negative.

Answer 7

sorry..! @lee_actress

Answer 8

it's ok.. Could one of you help me with a few more???

Answer 9

I need to get off the 'Net now, unfortunately. But if you'd please post new questions (one at a time) in the "Ask a question" box, someone else will respond eventually. Happy to have had these opportunities to work with you this afternoon and evening.

Answer 10

Thank you and same too you :)