## anonymous one year ago Macy wants to know if the number of words on a page in her grammar book is generally more than the number of words on a page in her math book. She takes a random sample of 25 pages in each book, then calculates the mean, median, and mean absolute deviation for the 25 samples of each book.

1. anonymous

mean absolute deviation determines how much variability there is

2. anonymous

the higher the mean absolute deviation is, the more variability there is

3. anonymous

the more variability there is, the less reliable the information is

4. anonymous

$\sigma=\sqrt{\frac{ \sum_{}^{} (x-xbar)^2}{n-1 }}$

5. anonymous

Median Mean Absolute Deviation Grammar 49.7 41 8.4 Math 34.5 44 1.9 She claims that because the mean number of words on each page in the grammar book is greater than the mean number of words on each page in the math book, the grammar book has more words per page. Based on the data, is this a valid

6. anonymous

it is not valid, since there is a lot of variability

7. anonymous

oh wait wrong formula...thats standard dev

8. anonymous

ok thanks!!! sry i took long for that part...i get it now :)

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