6
QuizMultiple Choice
Introduction to Normal Distributions
Question 6 of 10 • Math Models B
The class scores of a history test have a normal distribution with a mean = 79 and a standard deviation = 7. If Opal’s test score was 72, which expression would she write to find the z-score of her test score?
Answer
A
z = StartFraction 72 minus 79 Over 7 EndFraction
B
z = StartFraction 72 minus 7 Over 7 EndFraction
C
z = StartFraction 79 minus 72 Over 7 EndFraction
D
z = StartFraction 7 minus 79 Over 7 EndFraction