The price of a gallon of milk follows a normal distribution with a mean of $3.20 and a standard deviation of $0.10. What proportion of the milk vendors had prices that were less than $3.075 per gallon?
A) 0.8944
B) 0.3944
C) 0.2112
D) 0.1056

Question

Quizplus · Accepted Answer

To find the proportion of milk vendors with prices less than $3.075, we calculate the z-score: z = (3.075 - 3.20) / 0.10 = -1.25. Using a standard normal distribution table, a z-score of -1.25 corresponds to a cumulative probability of approximately 0.1056.

The Price of a Gallon of Milk Follows a Normal