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When the sample size and sample standard deviation

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Unformatted text preview: s AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Topic: Confidence interval for population mean σ unknown 16. The width of a confidence interval will be: A. Narrower for 99% confidence than 95% confidence. B. Wider for a sample size of 100 than for a sample size of 50. C. Narrower for 90% confidence than 95% confidence. D. Wider when the sample standard deviation (s) is small than when s is large. AACSB: Reflective Thinking Bloom's: Analysis Difficulty: Medium Topic: Confidence interval 17. As standard deviation increases, samples size _____________ to achieve a specified level of confidence. A. Increases B. Decreases C. Remains the same AACSB: Reflective Thinking Bloom's: Analysis Difficulty: Medium Topic: Confidence interval 1-654 Chapter 01 - An Introduction to Business Statistics 18. When determining the sample size, if the value found is not an integer initially, the next highest integer value will ____________ be chosen. A. Always B. Sometimes C. Never AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Sample size determination 19. When constructing a confidence interval for a population mean, if a population is normally distributed and a small sample is taken, then the distribution of _____ distribution. A. z B. t C. Neither D. Both A and B AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Topic: Confidence interval for population mean σ unknown 20. A confidence interval increases in width as A. The level of confidence increases B. n decreases C. s increases D. All of the above AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Topic: Confidence interval 1-655 is based on Chapter 01 - An Introduction to Business Statistics 21. The width of a confidence interval will be: A. Narrower for 98% confidence than for 90% confidence. B. Wider for a sample size of 64 than for a sample size of 36. C. Wider for a 99% confidence than for 95% confidence. D. Narrower for sample size of 25 than for a sample size of 36. E. None of the above. AACSB: Reflective Thinking Bloom's: Analysis Difficulty: Medium Topic: Confidence interval 22. A Research and Development Laboratory researcher for a paint company is measuring the level a certain chemical contained in a certain type of paint. If the paint contains too much of this chemical, the quality of the paint will be compromised. On the average, each can of paint contains 10% of the chemical, How many cans of paint should the sample contain if the researcher wants to be 98% certain of being within 1% of the true proportion of this chemical? A. 4887 B. 1107 C. 26 D. 645 AACSB: Analytic Bloom's: Application Difficulty: Medium Topic: Sample size determination for population mean 23. Which of the following is an advantage of confidence interval estimate over a point estimate for a population parameter? A. Interval estimates are more precise than point estimates. B. Interval estimates are less accurate than point estimates. C. Interval estimates are both more accurate and more precise than point estimates. D. Interval estimates take into account the fact that the statistic being used to estimate the population parameter is a random variable. AACSB: Reflective Thinking Bloom's: Synthesis Difficulty: Medium Topic: Confidence intervals 1-656 Chapter 01 - An Introduction to Business Statistics 24. When the sample size and sample standard deviation remain the same, a 99% confidence interval for a population mean, µ will be _________________ the 95% confidence interval for µ. A. Wider than B. Narrower than C. Equal to AACSB: Reflective Thinking Bloom's: Analysis Difficulty: Medium Topic: Confidence interval for population mean σ unknown 25. When the level of confidence and sample standard deviation remain the same, a confidence interval for a population mean based on a sample of n = 100 will be ______________ a confidence interval for a population mean based on a sample of n = 50. A. Wider than B. Narrower than C. Equal to AACSB: Reflective Thinking Bloom's: Analysis Difficulty: Medium Topic: Confidence interval for population mean σ unknown 26. When the level of confidence and the sample size remain the same, a confidence interval for a population mean µ will be ________________, when the sample standard deviation s is small than when s is large. A. Wider B. Narrower C. Neither A nor B, they will be the same AACSB: Reflective Thinking Bloom's: Analysis Difficulty: Medium Topic: Confidence interval for population mean σ unknown 1-657 Chapter 01 - An Introduction to Business Statistics 27. When the sample size and the sample proportion remain the same, a 90% confidence interval for a population proportion p will be ______________ the 99% confidence interval for p. A. Wider than B. Narrower than C. Equal to AACSB: Reflective Thinking Bloom's: Comprehension Difficulty: Medium Topic: Confidence interval for population proportion 28. When the level of confidence and sample proportion remain the same, a confidence interval for a population proportion p based on a sample of n = 100 will be ______________ a confidence interval for p based on a sample of n = 400. A. Wider than...
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This document was uploaded on 01/20/2014.

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