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Chapter 5: Q 13. (page 247)

Fill in the blanks.

(a) A is a quantitative variable whose value depends on chance.

(b) A discrete random variable is a random variable whose possible values .

Short Answer

Expert verified

Part (a) A random variableis a quantitative variable whose value depends on chance.

Part (b) A discrete random variable is a random variable whose possible values can be listed.

Step by step solution

01

Part (a) Step 1. Given information.

The given statement is:

Fill in the blanks.

(a) A is a quantitative variable whose value depends on chance.

(b) A discrete random variable is a random variable whose possible values .

02

Part (a) Step 2. Fill in the given blank.

The probability is a numerical value that is based on the likelihood of an event occurring.

If this is the case, the variable must be a random variable with a quantitative value.

Arandom variableis a quantitative variable whose value depends on chance.

03

Part (b) Step 1. Fill in the given blank.

The probable values of a discrete random variable can be listed.

A discrete random variable is a random variable whose possible values can be listed.

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Most popular questions from this chapter

Explain the significance of binomial coefficients with respect to Bernoulli trials.

ASU Enrollment Summary. According to the Arizona State University Enrollment Summary, a frequency distribution for the number of undergraduate students attending Arizona State University ( ASU ) in the Fall 2012 semester, by class level, is as shown in the following table. Here , 1 = freshman , 2 = sophomore , 3 = junior , and 4 = senior.

Class level
1234
No. of students
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11,115
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Let X denote the class level of a randomly selected ASU undergraduate.

(a) What are the possible values of the random variable X?

(b) Use random-variable notation to represent the event that the student selected is a junior ( class - level 3 ).

(c) Determine P ( X = 3 ), and interpret your answer in terms of percentages.

(d) Determine the probability distribution of the random variable X.

(e) Construct a probability histogram for the random variable X.

In Exercise 5.129 - 5.132, We have provided the probability distributions of the random variables considered in Exercise 5.109 - 5.112 of section 5.4 For each exercise, do the following tasks.

Part (a) Find the mean of the random variable.

Part (b) Obtain the standard deviation of the random variable by using one of the formulas given in definition 5.10.

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Part (a) Determine a sample space for this experiment.

Part (b) Determine the events that the total number of heads is even.

Discuss the pros and cons of binomial probability tables.
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