Chapter 13, Problem 13.3AC

Draw a scatter diagram with square feet of living space as the independent variable and selling price as the dependent variable and describe variable and describe the relationship between the size of a house and the selling price.

The data represent the cost, return on investment, and graduation rate for a random sample of fifty colleges or universities in the United States. The data is from payscale.com. The variable "Cost" represents the four-year cost including tuition, supplies, room and board of attending the school. The variable "Annual ROI" represents the return on investment for graduates of the school. It essentially represents how much you would earn on the investment of attending the school. The variable "Grad Rate" represents the graduation rate of the school. Complete parts (a) and (b) below. Click here to view the school data. Click here to view the table of critical values of the correlation coefficient. (a) Describe the association between Cost and Graduation Rate graphically by drawing a scatter diagram, treating Cost as the explanatory variable. Describe the association between Cost and Graduation Rate by finding the linear correlation between the two variables. Is there a linear association…

A nonprofit analyst seeks to determine which variables should be used to predict nonprofit charitable commitment, a nonprofit organization commitment to its charitable purpose. Two independent variables under consideration are Revenue, a measurement of total revenue, in billions of dollars, as a measure of nonprofit size X, and Efficiency, a measurement of the percent of private donations remaining after fundraising expenses as a measure of nonprofit fundraising efficiency X2. The dependent variable Y is Commitment, a measurement of the percent of total expenses that are allocated directly to charitable services. Both variables X, and Y are encoded as percents. Data are collected from a random sample of 98 nonprofit organizations, with the results provided in the accompanying table. Complete parts (a) through (c) below. E Click the icon to view the table of results. a. State the multiple regression equation. (Round to two decimal places as needed.)