Review_Ap_TwoSix

Review_Ap_TwoSix - Review_Apr 26 Use the information given...

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Review_Apr 26 Use the information given below to answer the four questions that follow: The effect of a corporate contract-training course on employee efficiency is the subject of a study. Based on advice from a statistics consultant, the human resources training specialist assigned two sets of 10 pages of equally difficult material for data entry by the same 9 staff members, with one set being entered before and the other after completing the corporate contract-training course. The raw data with the number of errors and Excel analysis using a 10% significance level are shown in the Tables below. Typist Before After 1 30 29 2 29 32 3 34 35 4 42 37 5 35 29 6 33 27 7 23 25 8 34 35 9 42 39 1. What is the table value of the appropriate test statistic to test the belief at the 10% level of significance that there is a reduction in the mean number of errors if data entry personnel go through the contract-training course? A. 1.40 * B. 1.86 C. 4.11 D. 1.711 E. 2.03 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 data entry personnel go through the training course? A. 0.809 B. 1.318 * C. 1.859 D. 1.711 E. 1.40 3. Which of the following ranges best represents the p-value (calculated t statistic) for testing the belief that there is a reduction in the mean number of errors if data entry personnel go through the contract-training course? A. p > 0.1* B. 0.05 < p < 0.1 C. 0.025 < p < 0.05 D. 0.01 < p < 0.025 E. p < 0.01 1 Before After Mean 33.55556 32 Variance 36.27778 23 Observations 9 9 Pearson Correlation 0.809221 Hypothesized Mean Difference 0 df 8 t Stat 1.318469 P(T<=t) one-tail XXXX t Critical one-tail 1.396815 P(T<=t) two-tail XXXX t Critical two-tail 1.859548 t-Test: Paired Two Sample for Means
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4. What are the decision and conclusion of the test? A. Fail to reject the null hypothesis, conclude there is insufficient evidence for error reduction. * B. Fail to reject the null hypothesis, conclude there is sufficient evidence for error reduction. C. Reject the null hypothesis; conclude there is evidence for error reduction.
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This note was uploaded on 03/12/2011 for the course BCIS 3610 taught by Professor Koh during the Spring '08 term at North Texas.

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Review_Ap_TwoSix - Review_Apr 26 Use the information given...

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