12
QuizMultiple Choice
Statistical Inferences — Unit test
Question 12 • AZ-Common Core Algebra II B
The times of all 15 year olds who run a certain race are approximately normally distributed with a given mean = 18 sec and standard deviation = 1.2 sec. What percentage of the runners have times less than 14.4 sec?
Answer
A
0.15%B
0.30%C
0.60%D
2.50%