Exam1C. FA02

# Exam1C. FA02 - COURSE MSCI 3710 EXAM 1 Version C S.S Print...

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Based on advice from a statistics consultant, a human resources training specialist assigns 15 pages of equally difficult text to be typed by the same person before and after completing the corporate contract-training course. The raw data with the number of errors and Excel analysis using a 5% significance level are shown in the tables below. Use this information to answer the next three questions . Typist Before After 1 29 25 2 19 17 3 34 30 4 42 37 5 35 29 6 33 31 7 X X 8 X X 9 X X 10 X X Before After Mean 33.4 30.8 Variance 57.1556 29.9556 Observations 10 10 Pearson Correlation 0.1418 Hypothesized Mean Difference 0 df 9 t Stat 0.9470 P(T<=t) one-tail xxxxxx t Critical one-tail 1.833 P(T<=t) two-tail xxxxxx t Critical two-tail 2.262 1. What is the critical value (at the 5% level) of the appropriate test statistic to test the belief that there is a reduction in the mean number of errors if typists go through the contract-training course? A. 1.383 B. 0.9106 C. 2.262 D. 0.9470 E. 1.833* 2
2. What is the calculated value of the appropriate test statistic to test the belief that there is a reduction in the mean number of errors if typists go through the contract-training course? A. 1.383 B. 0.9106 C. 0.9470 * D. 1.8331 E. 2.2622 3. Which of the following ranges best represents the p-value (observed level of significance) for testing the belief that there is a difference in the mean number of errors between typists who did not take the training course and those who completed the course? A.

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## This note was uploaded on 03/09/2011 for the course DSC 3710 taught by Professor Staff during the Spring '09 term at North Texas.

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Exam1C. FA02 - COURSE MSCI 3710 EXAM 1 Version C S.S Print...

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