Questions from Business Statistics

Q: The dataset on body fat contains 15 body measurements on 250 men

The dataset on body fat contains 15 body measurements on 250 men from 22 to 81 years old. Is average %Body Fat related to Weight? Here a scatterplot: And here the simple regression: Dependent variable...

Q: We saw in Chapter 7 that the calorie content of a breakfast

We saw in Chapter 7 that the calorie content of a breakfast cereal is linearly associated with its sugar content. Is that the whole story? Here the output of a regression model that regresses Calories...

Q: We saw a model in Exercise 24 for the calorie count of

We saw a model in Exercise 24 for the calorie count of a breakfast cereal. Can we predict the calories of a serving from its vitamin and mineral content? Here a multiple regression model of Calories p...

Q: The dataset Grades shows the five scores from an Introductory statistics course

The dataset Grades shows the five scores from an Introductory statistics course. Find a model for final exam score by trying all possible models with two predictor variables. Which model would you cho...

Q: What can predict how much a motion picture will make? We

What can predict how much a motion picture will make? We have data on 609 recent releases that includes the USGross (in $M), the Budget ($M), the Run Time (minutes), and the score given by the critics...

Q: A middle manager at an entertainment company, upon seeing the analysis

A middle manager at an entertainment company, upon seeing the analysis of Exercise 3, concludes that longer movies make more money. He argues that his company films should all be padded by 30 minutes...

Q: For the movies examined in Exercise 3, here is a scatterplot

For the movies examined in Exercise 3, here is a scatterplot of USGross vs. Budget: What (if anything) does this scatterplot tell us about the following assumptions and conditions for the regression?...

Q: For the movies regression in Exercise 3, here is a histogram

For the movies regression in Exercise 3, here is a histogram of the residuals. What does it tell us about the assumptions and conditions below? 1. Linearity Condition 2. Nearly Normal Condition 3. Equ...

Q: Look back at the regression in Exercise 3. Here is the

Look back at the regression in Exercise 3. Here is the partial regression plot for the coefficient of Budget. 1. What is the slope of the least squares regression line in the partial regression plot?...

Q: In Chapters 4 and 6 we’ve seen data Let look at data

In Chapters 4 and 6 we’ve seen data Let look at data from the Hopkins Forest. Here a regression that models the maximum daily wind speed in terms of the average temperature and preci...