1053.007 Basic Statistics Section 2: Multiple Choice: only ONE answer is co Answ
ID: 2932149 • Letter: 1
Question
1053.007 Basic Statistics Section 2: Multiple Choice: only ONE answer is co Answer the questions in your ParScore Form (from 12 to 15). 12. rrect. (3x4 = 12 points). we want to construct a confidence interval for but population standard deviation is unknown. In computing critical values, what table should we check? A. Z-Table B. t-Table C. Chi-square Table D. F-Table 13. we want to construct a confidence interval for but population standard deviation is unknown. Suppose sample size is 40. If we check t-table for critical value, what is the degree of freedom? A. 40 B. 41 C. 39 D. 38 E. None of Above 14. Which of the following statement is correct? A. The 91% confidence interval for is (0.15, 0.24). B. The 70% confidence interval for is (2323, 2445). C. As the degree of freedom increases, the spread of the corresponding t distribution ncreases. D. All Normal distributions are symmetric around C. 15. Keep everything else constant, for confidence interval of proportion, which will make the confidence interval the widest? A. 0.1 B. 0.25 C. 0.5 D. 1Explanation / Answer
12) option B
13)degree of freedom =sample size -1=39 ; option C
14) option B is correct; as confidence interval is made for populaiton parameter
15) option C is correct
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