Question

A candidate for mayor wants to know how strong her support is among voters, so she posts an online survey on her campaign website for voters to take.


Is this sample of voters likely to be biased or unbiased?

A.
biased







B.
unbiased

Answer 1

@driftracer305

Answer 2

likely to be biased, if i dont support someone, then i probably wouldnt even bother myself to go on their website, so only her supporters are taking the survey

Answer 3

To determine whether voters would be willing to vote for a tax increase to improve the city's schools, the board of education surveys 500 parents of children in the city's schools.


Why is this sample likely to be biased?









A.
The entire population of the city was not surveyed.







B.
Parents of school children are too busy to be bothered with surveys.







C.
There are not enough people in the sample.







D.
Parents of school children are more likely to be willing to pay more to improve schools.










Question Resources











To determine whether voters would be willing to vote for a tax increase to improve the city's schools, the board of education surveys 500 parents of children in the city's schools.


Why is this sample likely to be biased?









A.
The entire population of the city was not surveyed.







B.
Parents of school children are too busy to be bothered with surveys.







C.
There are not enough people in the sample.







D.
Parents of school children are more likely to be willing to pay more to improve schools.










Question Resources

Answer 4

a

Answer 5

@abram.macedonio

Answer 6

c

Answer 7

In a bin containing 500 marbles, 180 are red, 240 are blue, and 80 are green.


In a bowl of 25 marbles scooped from this bin, how many would be expected to be green?









A.
4







B.
8







C.
9







D.
12

Answer 8

A.

Answer 9

80/500 is 16% of the marbles which are green
so 25*16/100 gives you 4 green marbles

Answer 10

A battery manufacturer randomly tests 500 batteries and finds that 3 are defective.


How many defective batteries would be expected in a shipment of 12,000 batteries?









A.
120







B.
72







C.
60







D.
36

Answer 11

B.

Answer 12

A large bin of mixed nuts contains peanuts, cashews, almonds, and walnuts. Luke scoops out a bowl full of nuts and counts how many of each type he has: 18 peanuts, 8 cashews, 10 almonds, and 9 walnuts.


Armando scoops out a bowl of 30 nuts. About how many should he expect to be peanuts?









A.
4







B.
6







C.
9







D.
12

Answer 13

3/500 is 0.6% of defective from total
so 0.6/100 * 12,000 is 72

Answer 14

(for the previous one)

Answer 15

how about you tell me how you would do this based on the previous two, since the previous two have the exact same method

Answer 16

yep i agree