Exhibit 6-7
The weight of items produced by a machine is normally distributed with a mean of 8 ounces and a standard deviation of 2 ounces.
-Refer to Exhibit 6-7. What percentage of items will weigh at least 11.7 ounces?
A)46.78%
B)96.78%
C)3.22%
D)53.22%

Question

Quizplus · Accepted Answer

To find the percentage of items that will weigh at least 11.7 ounces, we need to find the z-score corresponding to this weight: (11.7-8)/2 = 1.85. Using a standard normal table or calculator, we can find that the percentage of items with a z-score greater than 1.85 is approximately 3.22%. Therefore, the correct answer is C.

Exhibit 6-7 The Weight of Items Produced by a Machine Is Normally