2. 0-14 points DevoreStat96. E.002. My Notes A survey collects demographic, soci

Question

2. 0-14 points DevoreStat96. E.002. My Notes A survey collects demographic, socioeconomic, 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 49 53 53 66 51 50 47 86 36 46 32 39 45 38 62 96 36 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%. (e) Calculate a point estimate of the population standard deviation. (Round your answer to three decimal places.) (b) 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 HDL level of at least 60. Need Help? ?.eean i Lonton teru

Explanation / Answer

sOL:

IN EXCEL GET THE DESCRIPIVE STATISTICS AS

Coming to answers

SolutionA:

point estimate for popualtion mean=sample mean=49.85

answer:49.85

Solutonb:

50 th percentie that is median

median=47.5

Solutionc:

pint estimate =sample stddev=3.812

answer:3.812

Solutiond:

proprtion=success/total=(events for >=60)/total

=4/20

=0.2

p=0.2

HDL Mean 49.85 Standard Error 3.812221 Median 47.5 Mode 53 Standard Deviation 17.04877 Sample Variance 290.6605 Kurtosis 2.24265 Skewness 1.482889 Range 66 Minimum 30 Maximum 96 Sum 997 Count 20

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