Question

The performing arts teacher wants to know whether the students in the entire school prefer music or theater. The teacher draws a random sample from the following groups:

All school teachers
All students in the band
All boys in each grade
All students in each grade
Which of the following groups best represents the population she should take a random sample from to get the best results for her survey?
All school teachers
All students in the band
All boys in each grade
All students in each grade

Answer 1

@Abhisar @Vocaloid

Answer 2

@Abhisar

Answer 3

@Vocaloid

Answer 4

well, we pick the sample that is most like the population

our population is: every student in the school, so which do you think is the answer?

Answer 5

D?

Answer 6

correct

Answer 7

Stanley wants to know how many students in his school enjoy watching talk shows on TV. He asks this question to all 24 students in his history class and finds that 55% of his classmates enjoy watching talk shows on TV. He claims that 55% of the school's student population would be expected to enjoy watching talk shows on TV. Is Stanley making a valid inference about his population?

No, it is not a valid inference because he asked all 24 students in his history class instead of taking a sample from his math class
No, it is not a valid inference because his classmates do not make up a random sample of the students in the school
Yes, it is a valid inference because his classmates make up a random sample of the students in the school
Yes, it is a valid inference because he asked all 24 students in his history class

Answer 8

note: the sample is just his history class, so it's not random

Answer 9

A?

Answer 10

@Vocaloid

Answer 11

read the answer choices again

Answer 12

d

Answer 13

keyword: "not random"

Answer 14

@Vocaloid

Answer 15

yes?

I'll say it again... the sample is not a random sample...

Answer 16

ok :)

Answer 17

A researcher posts a mobile advertisement offering $15 in exchange for participation in a short study. The researcher accepts the first 15 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 not a random sample of the population.
It is a valid sample because the first 15 people were selected to participate.
It is a valid sample because money was offered to participants.
It is not a valid sample because it is only a short study.

Answer 18

@Vocaloid

Answer 19

you didn't get the answer to the other question correctly, go back...

Answer 20

ok what is it?

Answer 21

again...

the sample is not random

now read the answer choices and tell me what the answer is...

Answer 22

A

Answer 23

keep trying...

pay attention to the words NOT RANDOM

Answer 24

c!

Answer 25

once again.... the sample is not a random sample....

Answer 26

pay attention to the word NOT(!!!!!) a random sample

Answer 27

D

Answer 28

one last time...


the sample of his history class is NOT a random sample... so our answer is...? which answer matches the most closely?

Answer 29

read every answer choice again CAREFULLY

Answer 30

i already said every choice and you said no for all of them

Answer 31

we're talking about the question for Stanley...

Answer 32

there's one answer you didn't say yet...

Answer 33

b

Answer 34

Stanley wants to know how many students in his school enjoy watching talk shows on TV. He asks this question to all 24 students in his history class and finds that 55% of his classmates enjoy watching talk shows on TV. He claims that 55% of the school's student population would be expected to enjoy watching talk shows on TV. Is Stanley making a valid inference about his population?

No, it is not a valid inference because he asked all 24 students in his history class instead of taking a sample from his math class
No, it is not a valid inference because his classmates do not make up a random sample of the students in the school
Yes, it is a valid inference because his classmates make up a random sample of the students in the school
Yes, it is a valid inference because he asked all 24 students in his history class

Answer 35

Right, B... do you understand why?

Answer 36

like I keep saying... the sample is not a random sample.... which matches answer B.... please focus...

Answer 37

ok :)

Answer 38

A researcher posts a mobile advertisement offering $15 in exchange for participation in a short study. The researcher accepts the first 15 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 not a random sample of the population.
It is a valid sample because the first 15 people were selected to participate.
It is a valid sample because money was offered to participants.
It is not a valid sample because it is only a short study.

Answer 39

anyway let's keep going...