Question

To find out what people are thinking about certain issues, a polling organization uses a method that gives every member of the population an equal chance of being given a survey.

What type of sampling is this organization using?

A. systematic sampling
B. simple random sampling
C. voluntary response sampling
D. convenience sampling

Answer 1

@sourwing

Answer 2

systematic -> like every ten person
random -> whatever
voluntary -> whoever wants it (this is more biased)
convenience -> whoever walks by (can be biased)

Answer 3

Umm... idk >,<

Answer 4

you want the one that is fair and equal right?
so biased means lending to one side -> not equal
so that eliminates C and D

Answer 5

Is it not A or B?

Answer 6

Oh... -.-

Answer 7

Is it B?

Answer 8

which do you think would be more equal?
randomly asking whoever to fill out the survey?
or asking every 5th person to fill out survey?

Answer 9

I guess asking every 5th person?

Answer 10

yes! and that process is called systematic :)

Answer 11

Aha, but I still don't get 100% >,< XD

Answer 12

hmmm... what do you not get?

Answer 13

I don't get:

"voluntary -> whoever wants it (this is more biased)
convenience -> whoever walks by (can be biased)"

Answer 14

voluntary is when someone volunteers to take the survey
convenience is when you ask the closest people to take the survey

Answer 15

Oooh, ok, sank you :)

Answer 16

you're welcome :)

Answer 17

A coach has 9 players signed up for his youth basketball team, but only 5 can play at a time.

Assuming all the players can play any position, how many different ways can the coach form a team of 5 players?

A. 45
B. 126
C. 15,120
D. 362,880

Answer 18

I don't know if this question is as simple as 9 * 5

Answer 19

Wait, that's not what I mean o.O
I don't think this question is solved as 9 * 5

Answer 20

9*8*7*6*5 I think...

Answer 21

Aha, makes sense :)
So the answer then is C?

Answer 22

yep :) I think so...

Answer 23

Think so? :P

Answer 24

A manager at a phone company wants to know if the company’s current customers would be interested in a new calling plan. Which sampling method will most likely result in a biased sample?

A. An office assistant divides the customers by time zone and randomly selects 100 customers in each zone.

B. An office assistant selects the customers who call the office with questions about their current plan during one week.

C. An office assistant selects every 50th name on a customer list.

D. An office assistant programs a computer to randomly select 500 customers from its database.

I think B

Answer 25

@jigglypuff314 ?

Answer 26

correct :)

Answer 27

Thanks :)

An airline flight attendant randomly chose 25 passengers on a transatlantic flight and asked them if they liked the new entertainment system. Twenty-one of those surveyed said yes. If there are 231 passengers in all, about how many would you expect to say that they liked the new entertainment system?

A. 119
B. 147
C. 194
D. 210

I think C

Answer 28

yep :)

Answer 29

I know this one is easy, but anyway XD

The list shows the heights of Larry's new plants in centimeters.

27 35 61 27 40

What is the mean height of Larry's new plants?

A. 27 cm
B. 34 cm
C. 35 cm
D. 38 cm <-

Answer 30

correct :)

Answer 31

<3


The owner of an apartment complex is preparing a report about the property. He wants to show how the number of available apartments changed during the year as the nearby factory closed down.

Which is the best data display for this situation?

A. bar graph
B. line graph <- ?
C. circle graph
D. stem-and-leaf plot

Answer 32

I'm not sure about this one, sorry :/

Answer 33

oh, it's alright :) this one?

A game has 40 chips, each labeled with a number from 1 through 40. Lisa randomly chooses one chip. What is the probability that she chooses 25 or a multiple of 10?

A. 1/400
B. 1/80
C. 1/10
D. 1/8 <- ?

Answer 34

yep :)

Answer 35

The table shows the results of spinning a spinner several times.

Outcome A B C D E
Frequency 3 2 1 4 2

What is the experimental probability of spinning a B or a C?

A. 2/5
B. 1/72
C. 1/4 <- ?
D. 3/5

Answer 36

yep :)

Answer 37

Alright, thanks :)