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In Exercises 5.16-5.26, express your probability answers as a decimal rounded to three places.

Occupations in Seoul. The population of Seoul was studied in an article by B. Lee and J. McDonald, "Determinants of Commuting Time and Distance for Seoul Residents: The Impact of Family Status on the Commuting of Women" (Urban Studies, Vol. 40, No. 7, pp. 1283-1302). The authors examined the different occupations for males and females in Seoul. The table at the top of the next page is a frequency distribution of occupation type for males taking part in a survey. (Note: M = manufacturing, N = nonmanufacturing.)

If one of these males is selected at random, find the probability that his occupation is

(a) service.

(b) administrative.

(c) manufacturing.

(d) not manufacturing.

Short Answer

Expert verified

Part (a) 0.189.

Part (b) 0.176.

Part (c) 0.239.

Part (d) 0.761.

Step by step solution

01

Part (a) Step 1. Given information.

The given statement is:

The population of Seoul was studied in an article by B. Lee and J. McDonald, "Determinants of Commuting Time and Distance for Seoul Residents: The Impact of Family Status on the Commuting of Women".

The authors examined the different occupations for males and females in Seoul. The table at the top of the next page is a frequency distribution of occupation types for males taking part in a survey.

Occupation

Frequency

Administrative/M

2,197

Administrative/N

6,450

Technical/M

2,166

Technical/N

6,677

Clerk/M

1,640

Clerk/N

4,538

Production workers/M

5,721

Production workers/N

10,266

Service

9,274

Agriculture

159

02

Part (a) Step 2. Find the probability that his occupation is service.

We know that an event's probability ranges from 0 to 1, and both 0 and 1 are included in it.


The formula for the probability of an event is:

P(E)=No.offavorableoutcomesTotalno.ofoutcomes

The total number of males examined by the authors in Seoul is 49,088.


The total instances where the male selected is in service occupation is:

9,274.

Now Let's take the occurrence 'E' as the male selected is in service occupation.

The probability that the male selected is in service occupation is:

P(E)=9,27449,088=0.189

03

Part (b) Step 1. Find the probability that his occupation is administrative.

The total instances where the male selected is in administrative occupation is:

=Administrative/M+Administrative/N

2,197+6,450=8647.

Now Let's take the occurrence 'E' as the male selected is in an administrative occupation.

The probability that the male selected is in an administrative occupation is:

P(E)=8,64749,088=0.176

04

Part (c) Step 1. Find the probability that his occupation is manufacturing.

The total instances where the male selected is in manufacturing occupation is:

=Administrative/M+Technical/M+Clerk/M+Productionworkers/M=2,197+2,166+1,640+5,721=11,724

Now Let's take the occurrence 'E' as the male selected is in a manufacturing occupation.

The probability that the male selected is in a manufacturing occupation is:

P(E)=11,72449,088=0.239

05

Part (d) Step 1. Find the probability that his occupation is not manufacturing.

The total instances where the male selected is not in a manufacturing occupation is:

=Total no. of instancesrole="math" localid="1651068330397" -total instances where the male selected is in manufacturing occupation

=49,088-11,724=37,364

Now Let's take the occurrence 'E' as the male selected is not in a manufacturing occupation.

The probability that the male selected is not in a manufacturing occupation is:

P(E)=37,36449,088=0.761

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