Question

Income and Residence. The U.S. Census Bureau compiles information on money income of people by type of residence and publishes its finding in Current Population Reports. Independent simple random samples of people residing inside principal cities (IPC), outside principal cities but within metropolitan areas (OPC), and outside metropolitan areas (OMA), gave the following data on income level.

Residence
Income		IPC	OPC	OMA	Total
	Under \(15,000	75	106	46	227
	\)15,000-\(34,999	106	161	61	328
	\)35,000-\(74,999	98	183	52	333
	\)75,000 and over	48	102	14	164
	Total	327	552	173	1052

a. Identify the populations under consideration.

b. Identify the variable under consideration.

c. At the 5% significance level, do the data provide sufficient evidence to conclude that people residing in the three types of residence are non homogeneous with respect to income level?

Short answer

It is obvious from the dot plot that there are more presidents between the ages of 50 and 58. The dot plot also reveals a roughly symmetric distribution.

Step-by-step solution

Given Definition

Create a dotplot for the ages of the first 44 presidents of the United States using MINITAB.

Procedure for MINITAB:

Step 1: Select Dotplot from the Graph menu.

Step 2: Click OK after selecting One Y-Simple.

Step 3: In the Graph variables section, type the relevant DATA column.

Step 4: Click the OK button.

Output

MINITAB OUTPUT: