Chapter 5: Computing Correlation Coefficients

Question 1

Correlation Coefficient

Answer 1

A numerical index that reflects the relationship between two variables, specfically how the value of one variable changes when the value of the other variable changes

Question 2

Pearson Product-Moment Correlation

Answer 2

See Correlation coefficient

Question 3

Direct Correlation

Answer 3

A positive correlation where the values of both variables change in the same direction

Question 4

Positive Correlation

Answer 4

See Direct correlation

Question 5

Indirect Correlation

Answer 5

A negative correlation where the values of the variables move in opposite directions

Question 6

Negative Correlation

Answer 6

See Indirect Correlation

Question 7

Scatterplot

Answer 7

A plot of paired data points on an x-axis and a y-axis, used to visually represent a correlation

Question 8

Scattergram

Answer 8

A plot of paired data points on an x-axis and a y-axis, used to visually represent a correlation

Question 9

Linear Correlation

Answer 9

A correlation that is best expressed visually as a straight line

Question 10

Correlation Matrix

Answer 10

A table showing correlation coefficients among more than two variables

Question 11

Coefficient of Determination

Answer 11

The amount of variance in one variable that is accounted for by the variance in another variable

Question 12

Coefficient of Alienation

Answer 12

The amount of variance inone variable tha is not accounted for by the variance in another variable

Question 13

Coefficient of Nondetermination

Answer 13

See Coefficient of Alienation

Question 14

Partial Correlation

Answer 14

A numerical index that reflects the relationship between two variables with the removal of the influence of a third variable (called a mediating or confounding variable)