An experiment consists of measuring the speed of automobiles on a highway by the use of radar equipment. The random variable in this experiment is speed, measured in miles per hour. This random variable is a

Continuous random variable

Explanation:

Continuous random variable is the one of the random variable which is defined as where the data could take infinitely many values for the variable.

For example, the random variable evaluates the time taken for doing something which is to be done or performed on continuous basis as there are infinite number of the possible times could be taken or consider.

So, in this case, the experiment comprise of evaluating the automobile speeds on the highway. Under this experiment, it have the infinite number. Therefore, this a continuous random variable