Question

Ski resorts are interested in the mean age that children take their first ski and snowboard lessons. They need this information to plan their ski classes optimally. Define the following in terms of the study. Give examples where appropriate.

A. The parameter is the average age of all people taking skiing or snowboarding lessons.
B. The parameter is the average age of all children taking skiing or snowboarding lessons on a given day.
C. The parameter is the ages of everyone at the ski resort.
D. The parameter is the average age of all children when they take their first skiing or snowboarding lesson.

Answer 1

Option D

Explanation:

Given that Ski resorts are interested in the mean age that children take their first ski and snowboard lessons. They need this information to plan their ski classes optimally.

The population of interest here is the children when they take their first skiing or snowboarding lesson. The average age of them would be a characteristic of a population. Hence this is the parameter.

D. The parameter is the average age of all children when they take their first skiing or snowboarding lesson.

Answer 2

The answer is D.

Explanation:

To get the mean or average that children take their first lesson we will need to know all the children when they took their first lesson during a large sample of days.

In this way, they could optimally plan the classes.

Answer A cannot be because we don't want to know about teenagers or adults.

Answer B cannot be because there's no information on how many children will turn up to their first lesson on average.

Answer C cannot be because the same reason as answer A.

However with answer D, we can approximately know how many children take their lessons, so we could anticipate how many things we would need per child.