TABLE 3-1

Health care issues are receiving much attention in both academic and political arenas. A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for Medicaid. The ages of 25 senior citizens were as follows:

60 61 6263 64 65 66 6868 69 7073 73

74 75 7676 81 81 82 8687 89 90 92

Referring to Table 3-1above:

Calculate the arithmetic mean age of the senior citizens to the nearest hundredth of a year.

Determine the median age of the senior citizens.

Determine the first quartile of the ages of the senior citizens.

Determine the third quartile of the ages of the senior citizens.

Determine the interquartile range of the ages of the senior citizens.

Determine which of the following is the correct statement.

A) One fourth of the senior citizens sampled are below 65.5 years of age.

B) The middle 50% of the senior citizens sampled are between 65.5 and 73.0 years of age.

C) The mean age of senior citizens sampled is 73.5 years of age.

D) All of the above are correct.

Identify which of the following is the correct statement.

A) One fourth of the senior citizens sampled are below 64 years of age.

B) The middle 50% of the senior citizens sampled are between 65.5 and 73.0 years of age.

C) 25% of the senior citizens sampled are older than 81.5 years of age.

D) All of the above are correct.

What type of shape does the distribution of the sample appear to have?

Calculate the variance of the ages of the senior citizens correct to the nearest hundredth of a year squared.

Calculate the standard deviation of the ages of the senior citizens correct to the nearest hundredth of a year.

Calculate the coefficient of variation of the ages of the senior citizens.