Data/probability problem

[asdfdsa]

Number of visits | Number of customers

1 4

2 6

3 7

4 or more 3

ok so

based on the survey, what are the odds that a customer visited the store 3 times

 

[Tinga]

50%

 

[the_goose69]

7:13 or 7 out of 20

 

[asdfdsa]

yeah, its 7/13, but how?

 

[the_goose69]

cus out of the the 20 total 7 of them went three times leaving 13 left i dont really know why its been a while since i did this but yea thats the answer

 

[1080ski]

It depends. Is the question asking about how many people went to the store 3 times and ONLY 3 times? In this case, the answer would be 7/20. Or is the question asking how many people went to the store 3 times (which would also include those who went to the store 4 times, since at one point, they went to the store 3 times)? In this case, the answer is (7+3)/20 = 10/20 = 1/2 = .5.

 

[asdfdsa]

it asks how many people went exactly 3 times and the answer in the back is 7/13.

 

[Jordan]

use PDF then, not CDF

 

[Tinga]

oh, right. exactly is a key word.

 

[babujib]

lol stat joke