. 7.5/10 points 1 Previous Answers DevoreStat 6.E.002. My Notes Ask Your A surve

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. 7.5/10 points 1 Previous Answers DevoreStat 6.E.002. My Notes Ask Your A survey collects demographic, socloeconomic, dietary, and health-related information on an annual basis. Here is a sample of 20 observations on HDL cholesterol level (mg/dl) obtained from the survey (HDL is "good" cholesterol; the higher its value, the lower the risk for heart disease). 34 48 53 53 64 51 51 47 87 36 46 33 38 45 38 62 95 34 30 48 (a) Calculate a point estimate of the population mean HDL cholesterol level 49.65 Making no assumptions about the shape of the population distribution, calculate a point estimate of the value that separates smallest 50%. (b) the largest 50% of HDL levels from the 47.5 (c) Calculate a point estimate of the population standard deviation, (Round your answer to three decimal places 16.58 st 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 of the population having an HDL level of at least 60. . 0.20 Need Help? Resd hTat Tter My Ask Your Teache

Explanation / Answer

The statistical software output for this problem is:

Summary statistics:

Hence,

Population standard deviation = 16.575

Column n Unadj. std. dev. var10 20 16.574906

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