# QNT 275 WEEK 4 QUIZ QNT 275 week 4 quiz

Consider the following simple linear regression model:   The response variable is:

β0

y

x

ε

The standard error of the estimate measures:

the variability of the values of the sample regression coefficients.

the variability of the observed y-values around the predicted y-values.

the variability of the predicted y-values around the mean of the observed y-values.

the variability of the explanatory variables.

Consider the following simple linear regression model:   β0 and β1 are:

the explanatory variables.

the random error terms.

the response variables.

the unknown parameters.

Another name for an explanatory variable is the ___.

dependent variable

independent variable

inferred variable

descriptive variable

For a given set of explanatory variables in general:

the width of a confidence interval is the same as the width of a prediction interval.

a confidence interval is wider than a prediction interval.

a confidence interval is narrower than a prediction interval.

The width of a confidence interval cannot be determined.

In a simple linear regression model if the plots on a scatter diagram lie on a straight line what is the standard error of the estimate?

Infinity

+1

0

-1

What is the name of the variable that’s used to predict another variable?

Explanatory

Standard Error of the Estimate

Coefficient of Determination

Response

Serial correlation is typically observed in:

cross-sectional data.

time series data.

sparse data.

outliers.

Which of the following violates the assumptions of regression analysis?

The error term is correlated with an explanatory variable.

The error term has a zero mean.

The error term is normally distributed.

The error term has a constant variance.

Which of the following variables is not qualitative?

Gender of a person

Student’s status (freshman, sophomore, etc.)

Religious affiliation

Number of dependents claimed on a tax return

# QNT 275 WEEK 4 QUIZ

QNT 275 week 4 quiz

Consider the following simple linear regression model:   The response variable is:

β0

y

x

ε

The standard error of the estimate measures:

the variability of the values of the sample regression coefficients.

the variability of the observed y-values around the predicted y-values.

the variability of the predicted y-values around the mean of the observed y-values.

the variability of the explanatory variables.

Consider the following simple linear regression model:   β0 and β1 are:

the explanatory variables.

the random error terms.

the response variables.

the unknown parameters.

# QNT 275 WEEK 4 QUIZ

Another name for an explanatory variable is the ___.

dependent variable

independent variable

inferred variable

descriptive variable

For a given set of explanatory variables in general:

the width of a confidence interval is the same as the width of a prediction interval.

a confidence interval is wider than a prediction interval.

a confidence interval is narrower than a prediction interval.

The width of a confidence interval cannot be determined.

In a simple linear regression model if the plots on a scatter diagram lie on a straight line what is the standard error of the estimate?

Infinity

+1

0

-1

# QNT 275 WEEK 4 QUIZ

What is the name of the variable that’s used to predict another variable?

Explanatory

Standard Error of the Estimate

Coefficient of Determination

Response

Serial correlation is typically observed in:

cross-sectional data.

time series data.

sparse data.

outliers.

Which of the following violates the assumptions of regression analysis?

The error term is correlated with an explanatory variable.

The error term has a zero mean.

The error term is normally distributed.

The error term has a constant variance.

# QNT 275 WEEK 4 QUIZ

Which of the following variables is not qualitative?

Gender of a person

Student’s status (freshman, sophomore, etc.)

Religious affiliation

Number of dependents claimed on a tax return