Untitled Flashcards Set

When the points in the scatter plot cluster closely around the regression line, the correlation can be said to be 

-Strong 

When responders who score high on the SATS tend to also to get high grades in college whereas those who score low on the SATS do poorly in college, there is reason to posit 

-A positive correlation between SATS and college grades 

A correlation coefficient expresses in a single number 

-Both the strength and the direction of a correlation 

R=-.17 represents 

-A correlation that is weak and negative 

Which of the following is NOT requires by Pearson's r? 

-Nominal data and random sampling  

A partial correlation coefficient gives us the correlation between two variables 

-After removing the common effect of a third variable 

In regression analysis, we predict the value of Y from X based on a  

-A mathematical equation 

Which of the following denotes the slope or the regression coefficient for X 

-The term b 

The increases or decrease in Y expected with each unit change in X is known as 

-The regression coefficient, b 

A measure of the proportion of the variance in Y explained by X is known as  

-The coefficient of determination  

Using two or more predictors, we conduct a  

Multiple regression