Stat 3500 Terms

If an independent variable is added to a multiple regression model, the R^2 value

becomes larger even if the variable added is not statistically significant.

The process of using the same or similar experimental units for all treatments is called

blocking

If the coefficient of determination is equal to 1, then the correlation coefficient

can be either −1 or +1.

In factorial designs, the response produced when the treatments of one factor interact with the treatments of another in influencing the response variable is known as

interaction

What is the joint effect of two independent variables acting together called?

interaction

A multiple regression model has

more than one independent variable.

What is the measure of goodness of fit for the estimated regression equation?

multiple coefficient of determination

Compared to the prediction interval estimate for a particular value of y in a linear regression model, the interval estimate for an average value of y will be

narrower

The number of times each experimental condition is observed in a factorial design is known as

replication

What is the difference between the observed value of the dependent variable and the value predicted using the estimated regression equation?

residual

In logistic regression,

the dependent variable only assumes two discrete values.

The ANOVA procedure is a statistical approach for determining whether or not the means of _____ are equal.

three or more populations

To calculate the residual, you would take

yi − ŷ