Question

What is the standard deviation of the data set given below?

5, 7, 9, 11, 13

Answer 1

do you know what standard deviation is

Answer 2

Somewhat

Answer 3

tell me what you know

Answer 4

(# - mean)^2 + ..........
--------------------- = square root of that <
#

Answer 5

of the question

Answer 6

I'll just say it the mean is 5

Answer 7

ok so now we have to find out how far each number is from the mean on the number line

Answer 8

You can't just say the mean is 5 and go with it. You actually have to find the mean to get the correct answer

Answer 9

which is 0, 2, 4, 6, 8

Answer 10

she said she already knows about the mean

Answer 11

the mean is 5

Answer 12

The data set is 5, 7, 9, 11, 13, so we add up all of the numbers together, then divide the sum by the total number of numbers in the set, so (5 + 7 + 9 + 11 + 13)/5 will be our mean/average

Answer 13

No, what is 5 + 7 + 9 + 11 + 13?

Answer 14

wait 45

Answer 15

It's 45, not 25, so that makes our mean 9. @snowflakelove15 are you stil here? When you come back, tell me if you know what to do next

Answer 16

ok so now we have to find out how far each number is from the mean on the number line which would be 4,2,0,2,4 then you would find the mean of that which is 12/5=2.4

Answer 17

so 2.4 is the average deviation

Answer 18

are we just waiting on snowflake

Answer 19

?

Answer 20

2.4 is the MAD - the Mean average deviation - i think!

Answer 21

I already figures it out and answered it earlier thank you though!