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Chapt8Examples

# Chapt8Examples - Statistics Chapter 8 Examples 1 Roller...

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Statistics - Chapter 8 Examples 1: Roller coasters get all their speed by dropping down a steep initial incline, so it makes sense that the height of that drop might be related to the speed of the coaster. Here's .a scatterplot of top Speed and largest Drop for 75 roller coasters around the world. 87.5 L me - 75 150 225 Drop (ft) a) Does the scatterplot indicate that it is appropriate to calculate the correlation? Explain. b) In fact, the correlation of Speed and Drop is 0.91. Describe the association. 2. A regression analysis of the initial drop (in feet) of a roller coaster ride and the duration of the ride (in seconds) yields the model: f = 91.033 + 0.242x, where Duration is the response variable and Drop is the explanatory variable. a. Explain what the slope of the line says about how long a roller coaster ride may last and the height of the coaster. b. A new roller coaster advertises an initial drop of 200 feet. How long would you predict the ride lasts?

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Chapt8Examples - Statistics Chapter 8 Examples 1 Roller...

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