midterm help.docx - 1 The following are body mass index(BMI...

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1. The following are body mass index (BMI) scores measured in 12 patients who are free of diabetes and participating in a study of risk factors for obesity. Body mass index is measured as the ratio of weight in kilograms to height in meters squared. 25 27 31 33 26 28 38 41 24 32 35 40 a) Compute the mean BMI
b) Compute the standard deviation of BMI
c) Compute the median BMI
d) Compute Q1 and Q3 e) Are there outliers in the distribution of BMI (justify your answer)?
f) Which measure best describe variability?
2. The following table shows the numbers of patients classified as underweight, normal weight, overweight and obese according to their diabetes status. Underweight Normal Weight Overweight Obese Diabetes 8 34 65 43 No Diabetes 12 85 93 40 If a patient is selected at random, a) What is the probability that they are overweight?
b) What is the probability that they are obese and diabetic?
c) What proportion of the diabetics are obese?
d) What proportion of normal weight patients are not diabetic? e) What proportion of patients are normal weight or underweight?
3. An investigator wants to assess whether smoking is a risk factor for pancreatic cancer.

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