Questions from Business Statistics

Q: Consider the roller coasters (with the outlier removed) described in

Consider the roller coasters (with the outlier removed) described in Exercise 30 again. The regression analysis gives the model Duration=87.22+0.389 Drop. 1. Explain what the slope of the line says ab...

Q: Is the nicotine content of a cigarette related to the tar?

Is the nicotine content of a cigarette related to the tar? A collection of data (in milligrams) on 816 cigarettes produced the scatterplot, residuals plot, and regression analysis shown: 1. Do you thi...

Q: In Chapter 6, Exercise 45 looked We can look at the

In Chapter 6, Exercise 45 looked We can look at the relationship between the number of runs scored by American League baseball teams and the average attendance at their home games for the 2016 season....

Q: Consider again the regression of Nicotine content on Tar (both in

Consider again the regression of Nicotine content on Tar (both in milligrams) for the cigarettes examined in Exercise 43. 1. What is the correlation between Tar and Nicotine? 2. What would you predict...

Q: Consider again the regression of Home Average Attendance on Runs for the

Consider again the regression of Home Average Attendance on Runs for the baseball teams examined in Exercise 44. 1. What is the correlation between Runs and Home Average Attendance? 2. What would you...

Q: Take another look at the regression analysis of tar and nicotine content

Take another look at the regression analysis of tar and nicotine content of the cigarettes in Exercise 43. 1. Write the equation of the regression line. 2. Estimate the Nicotine content of cigarettes...

Q: Most roller coasters get their speed by dropping down a steep initial

Most roller coasters get 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 a scatterplot of top Sp...

Q: Refer again to the regression analysis for home average attendance and games

Refer again to the regression analysis for home average attendance and games won by baseball teams, seen in Exercise 44. 1. Write the equation of the regression line. 2. Estimate the Home Average Atte...

Q: In Chapter 6, Exercise 39, We learned that the Office

In Chapter 6, Exercise 39, We learned that the Office of Federal Housing Enterprise Oversight (OFHEO) collects data on various aspects of housing costs around the United States. Here a scatterplot (by...

Q: In Chapter 6, Exercise 40, we saw Below is a

In Chapter 6, Exercise 40, we saw Below is a plot of mortgages in the United States (in trillions of 2013 dollars) vs. the interest rate at various times over the past 25 years. The correlation is r=0...