Current Attempt In Progress Please Use The Accompanying Excel Data Set Or Accompanying Text File Data Set When Completin 1 (266.73 KiB) Viewed 19 times
Current Attempt In Progress Please Use The Accompanying Excel Data Set Or Accompanying Text File Data Set When Completin 2 (239.33 KiB) Viewed 19 times
Current Attempt in Progress Please use the accompanying Excel data set or accompanying Text file data set when completing the following exercise. The final test and exam averages for 20 randomly selected students taking a course in engineering statistics and a course in operations research follow. Assume that the final averages are jointly normally distributed. Statistics OR Statistics OR Statistics OR Statistics OR 85 82 98 94 84 85 75 70 75 81 83 80 71 72 73 71 76 69 75 86 81 62 65 72 75 81 71 76 90 93 84 80 90 92 65 72 83 81 97 98 (a) Find the regression line relating the statistics final average (y) to the OR final average (x). Express results to 2 decimal places. + X (b) Test for significance of regression using a = 0.05. Calculate for . (Express result to 1 decimal place.) Is the model significant? (c) Estimate the correlation coefficient. Express result to 2 decimal places. r= (d) Test the hypothesis Ho: p = 0 versus H:p # 0, using a = 0.05. Calculate to . (Express result to 1 decimal place.) Is the correlation coefficient sufficiently different from zero?
75 81 90 98 80 90 92 65 22 83 81 28 (a) Find the regression line relating the statistics final average to the OR final average ). Expressresults to 2 decimal places. (b) Test for significance of regression using a = 0.05. Calculate fo (Express result to 1 decimal place.) Is the model significant? (c) Estimate the correlation coefficient Express result to 2 decimal places. P= (d) Test the hypothesis Ho: p = 0 versus H :p # 0, using a = 0.05. Calculate to: . (Express result to 1 decimal place.) Is the correlation coefficient sufficiently different from zero? (e) Test the hypothesis Ho: p = 0.5 versus H : P + 0.5, using a = 0.05. Calculate zo i (Express result to 2 decimal places.) Is the correlation coefficient sufficiently different from 0.5? (f) Construct a 95% confidence interval for the correlation coefficient. Express result to 2 decimal places. i Statistical Tables and Charts Save for Later Attempts: 0 of 1 used Submit Answer
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