Magdeline wants to know if the number of words on a page in her computer science 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 and then calculates the mean, median, and mean absolute deviation for the 25 samples of each book.

Book Mean Median Mean Absolute Deviation

Computer science 48.7 40 9.4

Math 34.2 45 1.9

She claims that because the mean number of words on each page in the computer science book is greater than the mean number of words on each page in the math book, the computer science book has more words per page. Based on the data, is this a valid inference?

Yes, because there is a lot of variability in the computer science book data

Yes, because the mean is larger in the computer science book

No, because the mean is larger in the computer science book

No, because there is a lot of variability in the computer science book data

Question

Mathematics

Ashlee Lyons

3 August, 03:42

Magdeline wants to know if the number of words on a page in her computer science 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 and then calculates the mean, median, and mean absolute deviation for the 25 samples of each book.

Book Mean Median Mean Absolute Deviation

Computer science 48.7 40 9.4

Math 34.2 45 1.9

She claims that because the mean number of words on each page in the computer science book is greater than the mean number of words on each page in the math book, the computer science book has more words per page. Based on the data, is this a valid inference?

Yes, because there is a lot of variability in the computer science book data

Yes, because the mean is larger in the computer science book

No, because the mean is larger in the computer science book

No, because there is a lot of variability in the computer science book data

+2

Answers (1)

Know the Answer?

Callie · Answer 1

It would be No, because there is a lot of variability in the computer science book data. Which is D. I chose this answer because her claim is wrong so it is going to be NO. And you can't use the mean because there is to much variability. There for it is D.