Question

Magdeline wants to know if the number of words on a page in her art book is generally more than the number of words on a page in her science 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
Art 68.7 50 15.4
Science 54.2 55 7.9
She claims that because the mean number of words on each page in the art book is greater than the mean number of words on each page in the science book, the art book has more words per page. Based on the data, is this a valid inference?

Yes, because the mean is larger in the art book
No, because the mean is larger in the art book
Yes, because there is a lot of variability in the art book data
No, because there is a lot of variability in the art book data

Answer 1

The deviation σ in the art book =15.4, the σ in the Science =7.9

Consequently the art book has data further away from the mean when compared to the science book. It will be difficult to have a valid inference.
No, because there is a lot of variability in the art book data

Answer 2

The inference regarding the deviation is not valid D. No, because there is a lot of variability in the art book data.

What is an inference?

An inference simply means the conclusion that can be deduced based on the information given.

In this case, the inference regarding the deviation is not valid because there is a lot of variability in the art book data.

In this case, the art book has data that is further away from the mean.

Learn more about deviation on:

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