Question

1. -/1 points DevoreStat9 6.E.002. My Notes Ask Your Teacher 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). 36 48 53 53 64 52 50 47 87 36 46 32 40 44 39 62 96 34 31 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. (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. p= Need Help? Read It Watch It Talk to a Tutor

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(a) Calculate a point estimate of the population mean HDL cholesterol level. 49.9 The point estimate of the population mean HDL cholesterol level is sample mean and sample mean = 49.9 (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%. 47.5 The point estimate of the value that separates the largest 50% of HDL levels from the smallest 50% is median (c) Calculate a point estimate of the population standard deviation. (Round your answer to three decimal places.) | 16.967 The point estimate of the population standard deviation is sample standard deviation (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. 4 p = 0.2 = 0.2