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# M000102 - Answer 0.03 3 A utility company serves 50,000...

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Lil-Help.com Math Tutorial 1 All products provided by Lil-Help are intended for academic resource and research only. These are not designed to replace student personal work and rules and regulations from schools, colleges, and universities should be applied when using our services. Customers are responsible for understanding and adhering to plagiarism rules and Lil-Help is not responsible for inappropriate use of products. Q11 1. A utility company serves 50,000 households. As part of a survey of customer attitudes, they take a simple random sample of 800 of these households. The average number of television sets in the sample households turns out to be 2.56, and the SD is 0.73. What is the observed value for the average number of television sets per household? Answer: 2.56 2. A utility company serves 50,000 households. As part of a survey of customer attitudes, they take a simple random sample of 800 of these households. The average number of television sets in the sample households turns out to be 2.56, and the SD is 0.73. Find the standard error for the sample average.
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Unformatted text preview: Answer: 0.03 3. A utility company serves 50,000 households. As part of a survey of customer attitudes, they take a simple random sample of 800 of these households. The average number of television sets in the sample households turns out to be 2.56, and the SD is 0.73. Find a 95% confidence interval for the average number of television sets per household. Answer: 2.50 to 2.62 4. A utility company serves 50,000 households. As part of a survey of customer attitudes, they take a simple random sample of 800 of these households. The average number of television sets in the sample households turns out to be 2.56, and the SD is 0.73. Find a 90% confidence interval for the average number of television sets per household. Answer: 2.51 to 2.61 5. The probability histogram for the average of the draws will follow the normal curve, even if the contents of the box do not, as long as the histogram is put into standard units, and the number of draws is large. Answer: True...
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