In her first five basketball games, Sarah scored 2, 5, 10, 15, and 18 points. What is the mean absolute deviation for this set of scores?

Question

dan815 · Answer

mean = sum up all the numbers and divide by the total number of numbers summed

dan815 · Answer

Standard deviation is the the sqrt of variance
and variance is a measure of how much our data is away from the mean

anonymous · Answer

ok well how do you get absolute deviation?

dan815 · Answer

@kropot72

dan815 · Answer

^ he is stats guy, explain deviations to us kropot

kropot72 · Answer

For a sample size N the mean absolute deviation is:
$$\frac{1}{N}\sum_{i=1}^{N}|x _{i}-\bar{x}|$$
where x-bar is the mean of the distribution. 
Does this make sense?

dan815 · Answer

oh i found on wiki
for avg abs deviation u just take diff and divide by total number of numbers

anonymous · Answer

not really...

anonymous · Answer

oh... yay thank you!

dan815 · Answer

|2-9|+|5-9|+|10-9|.....|    |
--------------------------
              5 <---- since there are 5 numbers in total

anonymous · Answer

oh ok. thank you! :)

dan815 · Answer

u welcome! :)