Question

A pharmacy wants to survey its customers to find out which brand of toothpaste they prefer.

Which survey methods are likely to be biased?

Choose all answers that are correct.

A.
A survey is sent to the customers who are on the pharmacy’s frequent buyer list.

B.
One hundred people from the pharmacy’s customer list are selected at random, called on the phone, and asked.

C.
Those customers who buy toothpaste with a coupon are selected, and the toothpaste brand they purchased is recorded.

D.
Every 10th customer who enters the pharmacy on 1 day is selected and asked.

Answer 1

B&C?

Answer 2

@pooja195

Answer 3

@texaschic101

Answer 4

D is unbiased
I'm pretty sure that C is biased

Answer 5

It Can Be More Then One

Answer 6

customers with a coupon are unlikely to be a representative sample

Answer 7

^

Answer 8

Because They might have a cupon for a different type of toothpast :P

Answer 9

yes i know
i'm not sure about B

Answer 10

yes exactly

Answer 11

Actuly it Might Be B And A

Answer 12

I think A is unbiased

Answer 13

@amistre64

Answer 14

- although a frequent buyer might not buy toothpaste at that pharmacy

Answer 15

True.

Answer 16

Sorry I cant be of any more help.

Answer 17

do you go to ca

Answer 18

A is biased....and I believe C is biased

Answer 19

I think A,B & C for the following reasons:

A. People how often come to the store and may be biased because they know what's in the store and are likely to go there because they have a preference for products in the store

B. A customer list may be somewhat biased for the same reason as A. Also, not everyone who answers the phone may be the person who purchases for the home and may be biased towards what is actually purchased

C. A coupon biases preferences based on value versus true preference

D. Unbiased

Answer 20

oh ok

Answer 21

Should i go with A B And C @texaschic101 ?

Answer 22

also i dont know how this deals with math xD