Question

http://prntscr.com/6fakbk

Answer 1

@bibby

Answer 2

Do you know what the mean absolute deviation is? Can you tell me the formula?

Answer 3

@yasminej

Answer 4

There's no need to keep tagging people, just answer my questions and I'll help you through this.

Answer 5

i dont know it

Answer 6

hmm

Answer 7

They wouldn't set you a question on this if you haven't covered it before. I suggest you do some revision on this. I'll talk you through this question, the Mean Absolute Deviation (MAD) is given by this formula:
\[MAD = \frac{1}{n}\sum_{i=1}^{n}\left| x_i - \bar{x} \right|\]x_i is each value in our data, x with a line over it is the mean, n is the number of elements in our data set.

So first of all we need to work out the mean number from your data, can you tell me what that is?