Purchase Solution

Kelley's Super Grocery Stores

Not what you're looking for?

Ask Custom Question

Many regions along the coast in North and South Carolina and Georgia have experienced rapid population growth over the last 10 years. It is expected that the growth will continue over the next 10 years. This has resulted in many of the large grocery store chains building new stores in the region. The Kelley's Super Grocery Stores, Inc. chain is no exception. The director of planning for Kelley's Super Grocery Stores wants to study adding more stores in this region. He believes there are two main factors that indicate the amount families spend on groceries. The first is their income and the other is the number of people in the family. The director gathered the following sample information.

"See Attached Excel file"

Food and income are reported in thousands of dollars per year, and the variable "Size" refers to the number of people in the household.

a. Develop a correlation matrix. Do you see any problems with multicollinearity?
b. Determine the regression equation. Discuss the regression equation. How much does an additional family member add to the amount spent on food?
c. What is the value of R2? Can we conclude that this value is greater than 0?
d. Would you consider deleting either of the independent variables?
e. Plot the residuals in a histogram. Is there any problem with the normality assumption?
f. Plot the fitted values against the residuals. Does this plot indicate any problems with homoscedasticity?

Purchase this Solution

Solution Summary

The solution takes Kelley's Super Grocery Stores data and analyzes the data to prepare it for regression. This includes a discussion of multicollinearity and homoscedasticity.

Solution Preview

a. Correlation matrix shown. There do not seem to be any problems with multicollinearity.
b. The regression equation ...

Purchase this Solution


Free BrainMass Quizzes
Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.