Exhibit 6-5
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 6-5. What is the random variable in this experiment?
A)the weight of items produced by a machine
B)8 ounces
C)2 ounces
D)the normal distribution

Question

Quizplus · Accepted Answer

The random variable is the weight of items produced by the machine, as this is the variable that is being measured and can vary from item to item. The mean and standard deviation are simply parameters of the distribution of this random variable. The normal distribution is not the random variable itself, but rather a description of the distribution of the random variable.

Exhibit 6-5 The Weight of Items Produced by a Machine Is Normally