3710Final.SuI04B

3710Final.SuI04B - Print Name Signature Final Exam S.S...

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Print Name: S.S. #: Signature: Final Exam: Summer 2004 Note: Whenever question(s) are connected you may be asked to assume a result (given a value) from the previous question but this result may or may not be correct. This is to prevent you from losing points on a second question because you made a mistake on a previous question. Instructions: n Please print your name and social security number on this exam. Also, put your signature on this exam. l On your scantron PRINT your name, your version, and your seat number. To better protect your privacy also print your name on the back side of your scantron. l You have 90 minutes to complete this exam. The exam is open book, open notes, and open mind. You may use any type of calculator but please show all your work on the exam and mark all answers on the scantron. l Many of the questions follow the format of those in Adventures in Business Statistics. The remaining questions are either based on the Excel assignment or use an Adventures-like approach with problems nearly identical to those assigned in the textbook. l When you have completed the exam, please insert your scantron into the exam booklet and turn them into your instructor. l No cheating. l Good luck and we wish you well on the exam.
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Use the information given in the paragraph below to answer first four questions. An investor is interested in finding out how Internet stocks performed in comparison to non- Internet technology stocks in the last quarter. Eleven non-Internet technology stocks and nine Internet stocks belonging to each category were randomly selected. Their total percentage returns for last quarter were tabulated and analyzed using Excel , assuming equal population variances , at the 10% significance level . The results are reproduced in the Table below. Use these results to answer the next four questions. Internet Technology 1.2 -1.4 -2.7 -4.3 3.4 -3.5 -4.6 4.3 -1.2 -4.5 -6.9 -3.2 -4.5 5.6 -5.9 t-Test: Two-Sample Assuming Equal Variances Internet Technology Mean -2.65 -1 Variance 12.7685714 17.6733333 Observations 8 7 Pooled Variance 15.0323077 Hypothesized Mean Difference 0 df 13 t Stat -0.8222796 P(T<=t) one-tail 0.21287164 t Critical one-tail 1.35017217 P(T<=t) two-tail 0.42574328 t Critical two-tail 1.7709317 1. The critical value of the appropriate test statistic to conduct the test of hypothesis for the belief that there is a difference in the mean returns is: A. -0.82 B. 0.213 C. 1.35 D. 0.4257 E. 1.77* 2. The calculated value of the appropriate test statistic to conduct the test of hypothesis for the
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belief that there is a difference in the mean returns is: A. -0.82* B. 0.213 C. 1.35 D. 0.4257 E. 1.77 3. Assuming the p value associate with the calculated value of the test statistics was 0.41 what is the conclusion? A. Conclude there is insufficient evidence of a difference in the means because the p value is
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This note was uploaded on 03/09/2011 for the course DSCI 3710 taught by Professor Dr.jay during the Spring '08 term at North Texas.

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3710Final.SuI04B - Print Name Signature Final Exam S.S...

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