Researchers are concerned that the weight of the average Australian school student is increasing implying,among other things,that children's clothing should be manufactured and marketed in larger sizes.If X is the weight of school children sampled in a nationwide study,then X is an example of
A) a categorical random variable.
B) a discrete random variable.
C) a continuous random variable.
D) a parameter.

Question

Quizplus · Accepted Answer

The weight of school children is a continuous random variable as it can take on any value within a certain range (e.g. 20kg to 100kg) and can be measured to any level of precision (e.g. 20.5kg or 78.9kg). It is not a categorical or discrete random variable as it cannot be divided into distinct categories or counted precisely. It is also not a parameter, which is a fixed numerical value related to a population, whereas X is a random variable related to a sample.

Researchers Are Concerned That the Weight of the Average Australian