Question 9

The maintenance department at the main campus of a large state university receives daily requests to replace fluorecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 42 and a standard deviation of 10. Using the 68-95-99.7 rule, what is the approximate percentage of lightbulb replacement requests numbering between 22 and 42? Question 10

The mean score on a driving exam for a group ofdriver's education students is 72 points, with a standard deviation of 3points.ApplyChebyshev's Theorem.At least 75% of the exam scores fall between ---- and-----. (Enter the smaller number first.)At least 88.9% of the exam scores fall between ----and----. (Enter the smaller number first.)