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

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
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?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/12/2011 for the course STA 215 taught by Professor Tba during the Spring '08 term at Grand Valley State University.

Page1 / 2

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

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online