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.

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mean absolute deviation determines how much variability there is

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

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

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