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Q2: The level of pollution because of vehicular emissions in a city is not regulated Measurements by the local government of the change in flow of vehicles and the change in the level of air pollution (both in percentages) on 12 days yielded the following results: Change in flow of vehicles Change in level of air pollution 28 36 15 26 15 18 21 24 18 21 31 52 40 12 16 21 17 20 a) Make a scatter plot to verify that it is reasonable to assume that the regression of y on x is linear b) Fit a straight line by the method of least squares c) Find a 95% confidence interval for the mean change in the level of air pollution when the change in the flow of vehicles is 30% Q3: With reference to Q2, find 99% limits of prediction for the level of air pollution when the flow of vehicles is 30%

Applied Statistics and Probability for Engineers 6th international

math   Statistics-And-Probability   
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ー x^2(X-Xbar)^2 yin2 (yi-yi^)^2 784 2.506934 23.536 2.359296 1296 91.84021 29.568 12.73062 225 130.3404 13.734 1.602756 361 55.00699 16.75 1.5625 576 5.84029420.2 0.2304 324 70.84033 15.996 1.008106 625 2.00695421.274 0.75076 31 12401600184.5069 32.584 2.509056 52 32791338.34 49.926 4.301476 144 207.8404 11.472 12.05478 256 108.507 14.488 6.310144 441 29.34031 18.258 3.034564 286| 8758| 10601|2226.917|241.442| 705.3274| XY 2 616 8 3 936 342 504 306 525 1 2 2 3 17 2 2 10 17 272 2 420 | 317| 26.41667 14 SUM=

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