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Chapter 8: Q.84 (page 482)

In words, define the random variableP鈥�.

Short Answer

Expert verified

The Binomial distribution of the random variable X has parameters of n=25andp=0.04.

Step by step solution

01

Introduction

A random variable is a mathematical representation of a number or object that is subject to chance. Informally, randomness usually refers to some element of chance, such as the roll of a die, but it can also refer to uncertainty, such as measurement mistake.

02

Given

The number of people who will be polled is =25.

Probability of being chosen and having the flu=0.04.

03

Explanation 

Xis a random variable in this question that follows the Binomial Distribution with parameters nand pof 25 and 0.04, respectively.

The following are the requirements for a binomial distribution: -

Because X, the random variable in this question, has all of these features, we can definitely claim that Xfollows the Binomial distribution.

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Most popular questions from this chapter

The mean age for all Foothill College students for a recent Fall term was 33.2. The population standard deviation has been pretty consistent at 15. Suppose that twenty-five Winter students were randomly selected. The mean age for the sample was 30.4. We are interested in the true mean age for Winter Foothill College students. Let X=the age of a Winter Foothill College student.

In words, define the random variable X炉.

Of 1,050randomly selected adults, 360identified themselves as manual laborers, 280identified themselves as non-manual wage earners, 250identified themselves as midlevel managers, and 160identified themselves as executives. In the survey, 82%of manual laborers preferred trucks, 62%of non-manual wage earners preferred trucks, 54%of mid-level managers preferred trucks, and 26%of executives preferred trucks

The sampling error given in the survey is 卤2%. Explain what the 卤2% means.

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