Who are the men and women who serve in our armed forces? Are they male or female, officers or enlisted? What is their ethnic origin and their average age? An article in Time magazine provided some insight into the demographics of the U.S. armed forces.9 Two of the bar charts are shown below.

a. What variables have been measured in this study? Are the variables qualitative or quantitative?

b. Describe the population of interest. Do these data represent a population or a sample drawn from the population?

c. What type of graphical presentation has been used? What other type could have been used?

d. How would you describe the similarities and differences in the age distributions of enlisted persons and officers?

e. How would you describe the similarities and differences in the age distributions of personnel in the U.S. Army and the Marine Corps?

Transcribed Image Text:

50% U.S. Army 40% - 30% - Enlisted Officers 20% 10% 0% 17 to 19 20 to 24 25 to 29 40 to 44 45 to 49 35 to 39 Age 50 and over 50% - U.S. Marlne Corps 40% - 30% - Enlisted Officers 20% - 10% - 0% 17 to 19 20 to 24 25 to 29 40 to 44 Age 50 and over 30 to 34 30 to 34 35 to 39 45 to 49