hw1 - Stat 503 Homework#1(80 points Due in class on 9/2...

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Stat 503 Homework #1 (80 points) Due in class on 9/2 1. (5pts) What is the login name of your blackboard account? 2.(8pts) In a study of schizophrenia, researchers measured the activity of the enzyme monoamine oxidase (MAO) in the blood platelets of 18 patients. The results (expressed as nmoles benzaldehyde product per 10 8 platelets) were as follows: Construct a frequency distribution and display it as a table and as a histogram. 3. (6pts) In a behavioral study of the fruitfly Drosophila melanogaster, a biologist measured, for individual flies, the total time spent preening during a six-minute observation period. The following are the preening times (sec) for 20 flies: 34 24 10 16 52 76 33 31 46 24 18 26 57 32 25 48 22 48 29 19 a) (4) Construct a stem-and-leaf display for these data. b) (2) Describe the shape of the distribution. 4. (4pts) The weight gains of beef steers were measured over a 140-day test period. The average daily gains (lb./day) of 9 steers on the same diet were as follows:
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hw1 - Stat 503 Homework#1(80 points Due in class on 9/2...

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