Question

Sam wants to know how many families in his neighborhood plan to attend the neighborhood cookout. He puts all 100 of the neighborhood addresses in a hat and draws a random sample of 25 addresses. He then asks those families if they plan to attend the cookout. He finds that 15% of the families plan to attend the cookout. He claims that 15% of the neighborhood families would be expected to attend the cookout. Is this a valid inference?

Answer 1

Yes, this is a valid inference because he took a random sample of the neighborhood

Yes, this is a valid inference because the 25 families speak for the whole neighborhood

No, this is not a valid inference because he asked only 25 families

No, this is not a valid inference because he did not take a random sample of the neighborhood

Answer 2

What do you not get? I know the answer, so I want to know whatr you need help with

Answer 3

I don't know how to figure it out..

Answer 4

So he asked 25 out of 100 people. [100 is for percents, if this helps] he 15 % of THAT said they're going to the cookout. Does that help?

Answer 5

also, you can first eliminate the ones that are definitely wrong. Like B. 25 families DON'T represent all 100 houses.

Answer 6

Okay so would it be the first one?

Answer 7

what was his claim?

Answer 8

He wants to know how many families plan to attend the cookout?

Answer 9

yes, and he claims 15% out of 100 families are going, right?

Answer 10

Yes

Answer 11

but he only asked 25

Answer 12

@ksmd13

Answer 13

Sorry, but isn't that 15% those 25 people?

Answer 14

no, it's 15% OF the 25 people. let's put it this way: he asked 15 people, 15% of them said they were going to the cookout. Does that make sense?

Answer 15

Oh okay

Answer 16

so now do you know what it is?

Answer 17

So the answer would be the first one?

Answer 18

no, it would be c because he only asked 25 when he claims it's out of all 100 people

Answer 19

ok?

Answer 20

I am dumb :P Thank you! can you help me with 2 more?