Question

A national real estate company just acquired a smaller firm with 150 offices and 6000 agents in Los Angeles and other parts of Southern California. The national firm conducted a sample survey to learn about attitudes and other characteristics of its new employees. In a sample of eight offices, all of the agents completed the questionnaire. Results of the survey for the eight offices follow.

Office	Agents	Average Age	College Grads	Males Agents
1	17	37	3	4
2	35	32	14	12
3	26	36	8	7
4	66	30	38	28
5	43	41	18	12
6	12	52	2	6
7	48	35	20	17
8	57	44	25	26

a. Estimate the mean age of the agents (to 4 decimals).

b. Estimate the proportion of agents who are college graduates and the proportion who are male (to 4 decimals).

College graduates:

Male:

c. Develop an approximate 95% confidence interval for the mean age of the agents (to 4 decimals).

d. Develop an approximate 95%confidence interval for the proportion of agents who are college graduates (to 4 decimals).

e. Develop an approximate 95% confidence interval for the proportion of agents who are male (to 4 decimals).

Answer 1