Chapter 4.1, Problem 21E

In Exercises 4.16–4.26, express your probability answers as a decimal rounded to three places.

4.21 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

1. a. service.
2. b. administrative.
3. c. manufacturing.
4. d. not manufacturing.

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