Set A contains 4, 5 and 6, and Set B contains 1, 5 and 9. Both sets have a mean of 5. Which set is more spread out, and why?

توضیح

Set A runs from 4 to 6 and so has a range of 2, while Set B runs from 1 to 9 and has a range of 8, which makes Set B the more spread out of the two. Concluding that the sets behave alike because both average 5 ignores spread altogether, since a mean marks a central figure and says nothing about how far the values sit from it.