311FinalExamSp07Solutions - Name Statistics 311 Final Exam...

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Name:__________________ Section: ___ KEY _ __ Statistics 311 Final Exam 5 June 2007 E:\Stat311\Spring2007\FinalExamSp07Solutions.doc 1 Please read the following instructions carefully. Do not turn the page and start the exam until you are told to begin. This is an open book exam. You may also have one sheet (double-sided) of 8.5 x 11 paper with notes (handwritten or typed). You may use a calculator, although be sure to show your work. There are 5 problems consisting of a mixture of multi-part short answer, true/false, and multiple choice questions. Point values for each question or part of a question are designated in parentheses at the beginning of the problem. Several problems ask you to calculate multiple quantities. Make sure that you answer all parts of a question and that your solutions are readable and that the grader can easily recognize your answers. I suggest that you underline, circle, or draw a box around final answers. GOOD LUCK!
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2 Problem 1 (4 points each). Answer the following multiple choice questions by circling the letter with the correct response: a) Which of the following is NOT true about the standard error of a statistic? A. The standard error roughly measures the average difference between the statistic and the population parameter. B. The standard error is the estimated standard deviation of the sampling distribution for the statistic. C. The standard error can never be a negative number. D. The standard error increases as the sample size(s) increases. b) Which statement is NOT true about the 95% confidence level? A. Confidence intervals computed by using the same procedure will include the true population value for 95% of all possible random samples taken from the population. B. The procedure that is used to determine the confidence interval will provide an interval that includes the population parameter with probability of 0.95. C. The probability that the true value of the population parameter falls between the bounds of an already computed confidence interval is roughly 95%. D. If we consider all possible randomly selected samples of the same size from a population, the 95% is the percentage of those samples for which the confidence interval includes the population parameter.
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311FinalExamSp07Solutions - Name Statistics 311 Final Exam...

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