Question

Here is data with y as the response variable. х y 42.3 77.1 63.4 73.3 41.7 75.1 26.3 70.1 50.9 87 47.3 80.6 42.5 79.1 31.4 76.5 193.3 100.5 Make a scatter plot of this data. Which point is an outlier? Enter as an ordered pair. For example (a,b) - with parenthesis. Find the regression equation for the data set without the outlier. Enter as an equation of the form y = a + bar, Rounded to three decimal places. For WAMAP questions, do not include the hat in y-hat. Find the regression equation for the data set with the outlier. Enter as an equation of the form y = a + bez. Rounded to three decimal places. For WAMAP questions, do not include the hat in y.hat. Is this outlier an influential point? No, the outlier does not appear to be an influential point. Yes, the outlier appears to be an influential point.

Answer 1

105 100 y = 0.154 x + 70.682 R2 = 0.757 95 90 85 80 75 70 65 60 +++++ 200 250 0 50 100 150 (193.3, 100.5) is an outlier.

88 86 84 82 80 y = 0.154 x + 70.683 R2 = 0.120 > 78 76 74 72 70 20 30 40 50 60 70 х The regression equation for the data set without the outlier is y = 70.683 +0.154x. The regression equation for the data set with the outlier is y = 70.682+0.154x.

No, the outlier does not appear to be an influential point.