**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