A bakery firm finds that its average weight of the most popular package of cookies is 32.06 ounces with a standard deviation of 0.1 ounces.What portion of cookie packages will weigh less than 31.9 ounces or more than 32.3 ounces?
A) 0.8000
B) 0.4452
C) 0.4918
D) 0.9370
E) 0.0630

Question

Quizplus · Accepted Answer

Using the standard normal distribution, calculate the z-scores for 31.9 and 32.3 ounces, then find the cumulative probabilities and sum the tails. The portion is approximately 0.0630.

A Bakery Firm Finds That Its Average Weight of the Most