23. A simple linear regression performed on this data produces a regression model of: 9 38.44970.18257x. What is the interpretation of the value of the slope? 24. If a new rollercoaster is made with a drop height of 212 ft, what is the predicted speed of this new rollercoaster? (Hint: use the regression model in the previous question) 25. An extreme rollercoaster enthusiast wants to construct a rollercoaster with a drop height of 500 ft and they want to use the regression model to predict the speed.. Would this be a valid prediction? B) No A) Yes
Homework Answers
20. The scatterplot indicates that the variable drop height and speed have a positive relationship.
It indicates that they have a strong relationship.
It indicates a linear relationship between the two variables.
21. Answer D) r = 0.9097
22. Answer A) Drop Height
23. Interpretation of the slope:
If drop height is increase by 1 unit then the speed will increase by 0.18257 unit.
24. predicted speed for drop height of 212 is
25. Answer B) No
Because the maximum range in scatterplot for drop height is 300. As the value 500 is outside the range of drop height. we cannot predict it.
it will not be a valid prediction.
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The accompanying scatterplot shows five blue data points. These five points produce a regression line with slope 0. Match each one of the red points (a through e) with the slope of the line after that one point is added. 1.1.1.1.2 0 2 4 6 8 10 12 Drag each point given above to the appropriate slope. [ 1) 0.65 2) 0.05 3) 0.00 | 4) -0.45 [ 5) -0.26 ] Researchers studying how a car's gas mileage...
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