Question

Which of the following is a sample of the population of bookstores on the West Coast of the United States?

I. All book stores in California
II. Randomly selected children's book stores
III. Internet book stores

A. I only
B. II only
C. I and III
D. III only
E. I and II

Answer 1

@jim_thompson5910

Answer 2

were you able to get anywhere with this?

Answer 3

yea i think its I. all book stores in California because internet bookstores could provide books from anywhere and randomly selected bookstores could come from all over the country

Answer 4

actually the population consists of every item you want to know about

in this case, "all book stores in California" is your population. You don't care about bookstores elsewhere

Answer 5

ok so you don't think it could also be the children's book store? just I only?

Answer 6

remember that a sample is a subset of the population

it is smaller than the population

Answer 7

so would that make all of them correct?

Answer 8

why would it be all of them? you want a sample

Answer 9

I'm not sure i just know all book stores in California is right because thats on the west coast and randomly selected book stores could be on the west coast

Answer 10

to do a sample, you don't have to do all of the elements in the population

Answer 11

otherwise, you're wasting money and there's no point to use inferential statistics

Answer 12

ok, so it should be I and II then shouldn't it? I'm not sure why I'm getting this so wrong

Answer 13

think of it like this

Answer 14

let's say this rectangle represents ALL the bookstores on the west coast



that's the population

Answer 15

inside the population, you pick a smaller sample

this sample should represent as much of the population as possible

so we'll have a smaller circle inside

Answer 16

let's say we have 10 bookstores

label them A through J

if we sample stores: C, F, G, H

we get