Assignment 7 - Solutions - Assignment 7 Comm 2501 Solutions Due at the start of class in the first class of the week of November 10th 2014 1 Data were

Assignment 7 - Solutions - Assignment 7 Comm 2501 Solutions...

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  • COMM 2501
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Assignment 7 - Comm 2501 - Solutions Due at the start of class in the first class of the week of November 10 th , 2014. 1. Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant. These data are contained in the file named Houston . Based upon past studies the population standard deviation is known with = $6. a. At 99% confidence, what is the margin of error? b. Develop a 99% confidence interval estimate of the mean amount spent for lunch. Solutions a. (5 points) With 99% confidence  /2 .005 2.576 z z Margin of Error =  2.576 / 2.576(6 / 64) 1.93 n b. (5 points) Confidence Interval:  21.52     1.93   or 19.59 to 23.45 2. Consumption of alcoholic beverages by young women of drinking age in the United Kingdom, the United States, and Europe was reported (The Wall Street Journal, February 15, 2006). Data (annual consumption in litres) consistent with the findings reported in The Wall Street Journal article are shown for a sample of 20 European young women.
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