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Contents : Statistics 5.100 Second Term 2001-2002 Assignment 3 Due in class on Feb 27 for L10 L12 and L16 Feb 28 for L13 and Feb 25 for L15 No late assignments will be accepted Show complete work Answer your questions in the order as given Put your name and student number on the covering page as well as each page PLEASE STAPLE YOUR PAPERS 1. The height of adult males is known to be normally distributed with mean 69 inches and standard deviation 2.5 inches. Using 68-99-99.7 rule find the proportion of adult males whose heights fall between 71.5 inches and 76.5 inches. 2. Textbook p 102 #2.18 3. Textbook p 102 #2.20 (Do not use JMPIN) 4. Textbook p 115 #2.34 5. Textbook p 183 #3.22 6. The following is a list of names of 30 students enrolled in a third year statistics course: Arado Berena Busch Chang Coates Collins Drasik Dyck Fergusn Gitter Hong House Kisiloski Koh Lau Leung Maddy Moffat Ng Orosz Palta Seman Sharma Tang Thavaneswaran Viray Wachal Wong Yu Yuska a) Assign each name a numerical label using the labels 01 02 .. 30. Provide the list of names with the labels that you assigned b) Go on to line 108 of Table B and write the string of digits from that line starting from left (60940 72 ). Place partitions after every second digit. You may have to use Line 109 of the same table. c) Suppose that a simply random sample of size 8 is to be taken. If you read the straight digits from left to right what eight people will you select 7. To determine the effectiveness of a new pain-relief medication a doctor will treat sixty patients (suffering from arthritis and needing pain relief) with the medication and will ask them an hour later "about what percentage of pain relief did you experience" a) Why should the doctor not simply administer the new drug and record patients responses b) Suppose the doctor wants to divide the sixty patients into three groups in order to compare the drug's effectiveness with that of aspirin and of a placebo. How should she divide sixty patients into three groups Why it is necessary to have as many patients as possible in each group c) Should patients be told which drug they are receiving How would this knowledge probably affect their reactions 8. Textbook p. 201 #3.48

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