Question

@AZ

Answer 1

Do you know how to find the mean ?

Answer 2

nope

Answer 3

ok to find the mean, you add up all the numbers and divide the answer by however many numbers there are .

Answer 4

so for the given plot, you have 1+2+3+4+4+5+5+6+7+8=

Answer 5

45

Answer 6

now divide it by 10 (the amount of numbers yu added up)

Answer 7

4 remainder 5

Answer 8

or just 4.5 but yes . so do the same thing with the other 4 plots. Which one equals 4.5 ?

Answer 9

This question is asking about the mean absolute deviation, not the mean

Remember that long formula we had to use the other day?

You'd basically have to do that for each answer choice and see which one has a similar MAD

Answer 10

or you can just take a look at the graphs, which graph looks exactly the same as the question?

That one is going to have the same mean absolute deviation

because all the data values are in the same relationship to each other so it deviates the same amount from the mean

Answer 11

i think the answer is A. for this one e.e

Answer 12

You got it

It has the same numbers but just because the numbers are all spread out in the same way so it's going to have the exact same MAD

Answer 13

i dont know how to use that calculator tho e.e

Answer 14

okay so to use that calculator, all you have to do is count the value of each dot

so for example there is only one dot on top of 1, 2, 3
and then there's two on top of 4 and 5
and one dot on top of 6, 7, 8

so your list of numbers is

1, 2, 3, 4, 4, 5, 5, 6, 7, 8

and you just enter that into http://www.alcula.com/calculators/statistics/mean-absolute-deviation/

Answer 15

and it's the same idea for all of the answer choices

just count how many dots are on top of that number and that's how many times that number is in the list