Bud and Lou were arguing about scores on the Ace Slap-Stick Comedy Test. These scores are distributed normally with a mean of 50. They agreed that 10% of the population had scores of 60 or better (and they were correct on this). Bud also claimed that 10% of the population had scores of 40 or below.
A) Bud is correct
B) Bud is correct but only because each score point is worth one percentage point
C) Bud is mistaken
D) More information is necessary before a decision can be made.

Question

Quizplus · Accepted Answer

In a normal distribution, the data is symmetric around the mean. If 10% of the population scores 60 or better, then 10% also scores 40 or below, given the mean is 50.

Bud and Lou Were Arguing About Scores on the Ace