Stats Chapter

In a scatterplot r is called

• Coefficient of Determination

• Correlation coefficient

• Regression Line

• Slope

If the correlation coefficient is r = 0.3, what type of data is shown?

• Strong positive

• Weak positive

• Strong negative

• Weak negative

Determine the Correlation Coefficient and decide whether it is weak, moderate, or strong.

• -0.19 weak

• -0.19 moderate

• 0.04 weak

• 0.04 strong

When calculating the linear model (which is the equation for the Line of Best Fit for a set of quantitative data) our goal is to...

• Minimize the residuals

• Maximize the residuals

• Ignore the residuals

• What are residuals?

_____________________ is the use of a regression line for prediction outside the interval of x values used to obtain the line.

The ___________________ measures the percent of the variability in the response variable that is accounted for by the least-squares regression line.

• coefficient of determination

• coefficient of relaxation

After performing analyses on a set of data, Mrs. Schoeneck examined the scatter plot of the residual values for each analysis. Which scatter plot indicated the best linear fit for the data?

• A

• B

• C

• This residual graph represents a linear fit.
• This graph represents a nonlinear fit.
• This residual graph represents no fit.

I predicted someone would score a 78% on their test, but they actually scored an 81%. What's the residual?

• 81 - 78 = 3

• 78 - 81 = -3

• What's residual?