R Value Stats

What is the correlation value?

• .209

• .457

• .13

• .361

What is the value of the correlation coefficient, r?

• 0.921

• -0.921

• 0.957

• -0.957

Describe the correlation in the graph shown.

• Strong Negative

• Strong Positive

• Weak Negative

• Weak Positive

Estimate the correlation coefficient.

• r=0

• r=-1

• r=1

• r=2

What is the slope of the LSRL from this printout?

• 0.7407674

• 23.591485

• 0.02349

• 1.098

What letter do we use to represent correlation coefficient?

• c

• r

• p

• h

Given the image of linear regression computer output, what would the correlation coefficient be?

• .922

• .96

• -0.03761

• 28.37

To determine property taxes, Florida reappraises real estate every year, and the county appraiser's website lists the current "fair market value" of each piece of property. Property usually sells for somewhat more than the appraised market value. We collected data on the appraised market values x and the actual selling prices y (in thousands of dollars) of a random sample of 16 condominium units in Florida. We checked that the conditions for inference about the slope of the population regression line are met. Here is part of the Minitab output from a least-squares regression analysis using these data. The equation of the least-squares regression line for predicting selling price from appraised value is

Is there a relationship between reaction time and age? A statistics student measures the reaction time of 12 subjects by measuring how far a yardstick drops, in inches, before a subject catches it between his or her thumb and forefinger (a high number thus indicates a slow reaction time). The student plans to use linear regression to see if reaction time can be predicted by the age of the subject. Output from a computer regression analysis is given below. The equation of the least-squares regression line is

• 
• 
• 

Which best describes the correlation of the scatter plot?

• Negative Linear Correlation

• Positive Linear Correlation

• No Correlation

• Nonlinear Correlation