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Unformatted text preview: MATH 1131 3.0  Fall 2011 Assignment 3 (Due Date: November 9, 2011) (Answer all questions) Question 1: According to Statistics Canada, 8.8% of Canadian families have five or more members. a. If we take a random sample of 10 families, what is the probability that at least 2 of them will be of size five or bigger? b. If we take a random sample of 400 families, what is the probability that more than 34 of them will be of size five or bigger? c. If we take a random sample of 1000 families, what is the probability that exactly 90 of them will be of size five or bigger? Question 2: The normal body temperature measured by placing the thermometer under the tongue is assumed to be normally distributed with a standard deviation of 0 . 7 o C . Body temperatures of 52 subjects were recorded and the average is 36 . 83 o C . a. Find a 98% confidence interval for the mean body temperature? b. Interpret the interval obtained in part (a) in the context of this question....
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 Fall '10
 Wong
 Statistics, Probability

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