Chapter 5, Problem 1RP

Fill in the blanks.

1. a. A ______ is a quantitative variable whose value depends on chance.
2. b. A discrete random variable is a random variable whose possible values _______.

To determine

Identify the quantitative variable whose value depends on chance.

Answer to Problem 1RP

A random variable is a quantitative variable whose value depends on chance.

Explanation of Solution

Justification:

Random variable:

A random variable X is a numerical outcome of a probability experiment. Moreover, there is a numerical value which is determined, by chance, for each outcome in the procedure or experiment. Each random variable has a probability distribution, which specifies the probability whose value lies in any given interval.

Statistics Concept Introduction

A random variable is a numerical outcome of a probability experiment.

To determine

Identify the possible values of a discrete random variable.

Answer to Problem 1RP

A discrete random variable is a random variable whose possible value is finite.

Explanation of Solution

Justification:

Discrete random variable:

A discrete random variable is one which takes on only a countable number of values. That is, it takes values 0,1,2,3…. That is, a discrete random variable takes a collection of values which is finite or countable.

Statistics Concept Introduction

A discrete random variable takes a collection of values which is finite or countable.