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Chapter 4: Q.18 (page 283)

Complete the expected value table.

Short Answer

Expert verified

The expected value table is given below:

Step by step solution

01

Given Information

Every month, Javier participates in special events as a volunteer. In a month, he does no more than five events. He visits exactly five activities 35%of the time, four activities 25%of the time, three activities 20%of the time, two activities 10%of the time, one activity 5%of the time, and no activities 5%of the time.

02

Calculation & Explanation

Multiplying the Xcolumn with the P(X)column generates the third column in the table.

That is:

(0)*(0.2)=0.0,(1)*(0.2)=0.2,(2)*(0.4)=0.8and(3)*(0.2)=0.6...

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Most popular questions from this chapter

It has been estimated that only about 30% of California residents have adequate earthquake supplies. Suppose you randomly survey 11 California residents. We are interested in the number who have adequate earthquake supplies.

a. In words, define the random variable X.

b. List the values that X may take on.

c. Give the distribution of X. X ~ _____(_____,_____)

d. What is the probability that at least eight have adequate earthquake supplies?

e. Is it more likely that none or that all of the residents surveyed will have adequate earthquake supplies? Why?

f. How many residents do you expect will have adequate earthquake supplies?

Ellen has music practice three days a week. She practices for all of the three days 85% of the time, two days 8% of the time, one day 4% of the time, and no days 3% of the time. One week is selected at random. What values does X take on?

Define the random variable X.

X ~ _____(_____,_____)

An electronics store expects to have ten returns per day on average. The manager wants to know the probability of the store getting fewer than eight returns on any given day. State the probability question mathematically.
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