Home Chapter 13 Quiz

# Quiz

This activity contains 15 questions.

## The prediction interval estimate is __________ the 95% confidence interval estimate.

 wider than narrower than the same size as unrelated to

## The coefficient of multiple determination should be adjusted when dealing with multiple regression models. The adjusted reflects the:

 number of explanatory variables in the model and the sample size. magnitude of the predicted value and the standard deviation of the data. the value of the net regression coefficient. population size and number of dependent variables.

Dwayne is curious about why bees pollinate certain flowers over others. Let represent the size of the flower, let represent the color intensity, and let Y be the frequency of pollination. The slope of with Y is 0.4213 when is held constant, and the standard error in the regression coefficient is 0.0895. Find the value of t in the test for the slope in multiple regression.

 4.71 3.41 1.08 5.93

## A researcher wants to estimate the population value of a regression coefficient including a confidence interval. The formula for the confidence interval estimate for the slope is:

Given two independent variables and , if the sum of squares due to regression of both and is equal to 15, and the error mean square is equal to 1.5, what is the value of F in the partial F-test for determining the contribution of an independent variable?

 5 10 3 20

## The t statistic is equal to the __________ of the F statistic.

 natural log square root square cube root

## The proportion of the variation in the dependent variable attributed to each explanatory variable while all other explanatory variables are held constant is measured by:

 net regression coefficients. coefficients of partial determination. collinearity coefficients. coefficients of multiple determination.

## The quadratic curvilinear regression model is similar to the multiple regression model except that the second explanatory variable is the __________ of the first explanatory variable.

 base 10 log square cube root natural log

## The formula for the transformed exponential model is:

If the coefficient of multiple determination of explanatory variable is equal to 0.546 with all other B variables, what is the value of the variance inflationary factor for ?

 3.78 2.93 7.43 1.42

## __________ regression is the search procedure which attempts to find the best regression model without examining all possible regressions.

 Exponential Best subset Stepwise Multiple

In addition to the adjusted value, the statistic most often used to evaluate competing regression models and measure the differences between a fitted regression model and a true model, along with the random error is the:

 partial F statistic statistic variance inflationary factor interaction statistic

## One method of measuring collinearity uses the:

 variance inflationary factor. partial F statistic. interaction statistic. statistic.