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Mathematics, 25.12.2019 01:31 mhzperfect
The national health and nutrition examination survey (nhanes) collects demographic, socioeconomic, dietary, and
health-related information on an annual basis. here is a sample of 20 observations on hdl cholesterol level [mg/di)
obtained from the 2009-2010 survey (hdl is 'good' cholesterol; the higher its value, the lower the risk for heart disease):
35 49 52 54 65 5 1 5 1
47 86 36 46 33 39 45
39 63 95 35 30 48
a. calculate a point estimate of the population mean hdl cholesterol level.
b. making no assumptions about the shape of the population distribution, calculate a point estimate of the value that
separates the largest 50% of hdl levels from the smallest 50%.
c. calculate a point estimate of the population standard deviation.
d. an hdl level of at least 60 is considered desirable as it corresponds to a significantly lower risk of heart disease. making
no assumptions about the shape of the population distribution. estimate the proportion p of the population having an
h dl level of at least 60.
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