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 government health care but who have no private health insurance.

The ages of 25 uninsured senior citizens were as follows:

68 73 66 76 86 74 61 89 65 90 69 92 76 62 81 63 68 81 70 73 60 87 75 64 82

Suppose the mean and standard deviation are 74.0 and 9.7, respectively. If we assume that

the distribution of ages is bell shaped, what percentage of the respondents will be between

64.3 and 93.4 years old?