EC315 Practice Week 3; Chapter 9 Quiz

# EC315 Practice Week 3; Chapter 9 Quiz - Practice Week 3;...

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1. A point estimate is A. Always an estimate population mean. B. Always equal to the population value. C. An estimate of the population parame D. None of the above The correct answer is c. You could be estimating a population proportion or the population standard deviation as well as a mean. 2. A confidence interval A. Always includes the population paramete B. Decreases in width as the sample size C. Cannot include a value of 0. D. None of the above. The correct answer is b. A confidence interval can include any value and you can only hope it includes the population parameter. 3. If we wished to decrease the width of a confidence interval, we would do which of the following? A. Increase the size of the sample. B. Reduce the size of the population. C. Decrease the level of confidence. D. Both A and C. The correct answer is d. The width would decrease if you increased the size of the sample or reduced the level of confidence. 4.

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## This note was uploaded on 11/11/2011 for the course EC 315 taught by Professor Barcus during the Spring '10 term at Park.

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EC315 Practice Week 3; Chapter 9 Quiz - Practice Week 3;...

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