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 provided. Determine which of the statements below is true.

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A.		One fourth of the senior citizens sampled are below 65.5 years of age.
b		The mean age of senior citizens sampled is 73.5 years of age.
c		The middle 50% of the senior citizens sampled are between 65.5 and 73.0 years of age.
d		All correct.