Questions from Business Statistics

Q: In previous chapters we have looked at data from the 50 states

In previous chapters we have looked at data from the 50 states. Here an analysis of data from a few years earlier. The Murder rate is per 100,000, HS Graduation rate is in %, Income is per capita inco...

Q: In Exercise 25 of Chapter 9 , we considered a multiple regression

In Exercise 25 of Chapter 9 , we considered a multiple regression model for predicting calories in breakfast cereals. The regression looked like this: Dependent variable is: Calories R-squared =38.4%...

Q: In Chapter 9 , Exercises 14 , 18, 29, and

In Chapter 9 , Exercises 14 , 18, 29, and 30, we considered data on hill races in Scotland. These are overland races that climb and descend hills sometimes several hills in the course of one race. Her...

Q: The United States Central Intelligence Agency maintains a public site called the

The United States Central Intelligence Agency maintains a public site called the World Factbook at www.cia.gov/library/publications/the-worldfactbook/. There you find a wealth of variables about all t...

Q: Union rated frozen pizzas. Their report includes the number of Calories

Union rated frozen pizzas. Their report includes the number of Calories, Fat content, and Type (cheese or pepperoni, represented here as an indicator variable that is 1 for cheese and 0 for pepperoni)...

Q: Here is a scatterplot matrix of the variables as re-expressed

Here is a scatterplot matrix of the variables as re-expressed in Exercise 13 using a version that places Normal probability plots on the diagonal. 1. Comment on their suitability for a regression mode...

Q: Here a plot of the Studentized residuals against the predicted values for

Here a plot of the Studentized residuals against the predicted values for the regression model found in Exercise 14 : The two extraordinary cases in the plot of residuals are Reggio and Michelina, two...

Q: At the top of the next column is a regression analysis to

At the top of the next column is a regression analysis to predict Life expectancy using the data of Exercise 15 and a plot of the residuals Response variable is: Life expectancy 240 total cases of whi...

Q: A plot of Studentized residuals against predicted values for the regression model

A plot of Studentized residuals against predicted values for the regression model found in Exercise 16 now looks like this. It has been colored according to Type of pizza and separate regression lines...

Q: Prior to graduation, a high school class was surveyed about its

Prior to graduation, a high school class was surveyed about its plans. The following table displays the results for white and minority students (the Minority group included African American, Asian, Hi...