The following table shows the number of people, in thounds, in the United States with and without health insurance in 2011, according to the U.S. Census Bureau:
|
Age Group
|
insured
|
Uninsured
|
|
Under 18 years
|
66,835
|
6,902
|
|
18 to 24 years
|
22,491
|
7,649
|
|
25 to 34 years
|
29,690
|
11,529
|
|
35 to 44 years
|
31,588
|
8,399
|
|
45 to 64 years
|
68,544
|
13,382
|
|
65 years and older
|
40,817
|
690
|
a. What percentage of the U.S. population in 2011 did not have health insurance and was between the ages of 18 to 24 years?
b. What percentage of the U.S. population in 2011 did not have health insurance or was between the ages of 25 to 34 years?
c. What percentage of the U.S. population in 2011 did have health insurance, given they were 65 years or older?
d. Do age group and health insurance appear to be independent or dependent events? Define Event A as a person 45 to 64 years old and Event B as the person insured. What conclusions can be drawn with this information?