Statistics PSY302 Regression Quiz

1. The symbol used to represent the population correlation coefficient is: Σ Μ β α ρ

1. The symbol used to represent the population correlation coefficient is: Σ Μ β α ρ

2. When using correlation we have an alpha level of: .10 .05 .0005 5.0 All of the above

2. When using correlation we have an alpha level of: .10 .05 .0005 5.0 All of the above

3. Correlations work only when you are dealing with ___. Causes Associations Categories Chi Squares Qualitative data

3. Correlations work only when you are dealing with ___. Causes Associations Categories Chi Squares Qualitative data

4. Regression is all about: Finding causal relationships Understanding the reason for observed findings Prediction Determining the difference between measurement and categorical data Making ad hoc comparisons in Chi Square

4. Regression is all about: Finding causal relationships Understanding the reason for observed findings Prediction Determining the difference between measurement and categorical data Making ad hoc comparisons in Chi Square

5. The higher the absolute value of the correlation coefficient the ____ the prediction. Worse More accurate More confusing Less confident All of the above

5. The high the absolute value of the correlation coefficient the ____ the prediction. Worse More accurate More confusing Less confident All of the above

6. To predict college gpa from high school gpa we create a regression equation in order to plot: A regression line A histogram Causal relationship Categorical data A pie chart

6. To predict college gpa from high school gpa we create a regression equation in order to plot: A regression line A histogram Causal relationship Categorical data A pie chart

7. In regression we are predicting the value of one variable called Y based on another variable called: Delta X Chi Square Nancy All of the above

7. In regression we are predicting the value of one variable called Y based on another variable called: Delta X Chi Square Nancy All of the above

8.The Variable we are predicting is called the ____ or dependent variable. Standard deviation Mean square Criterion Independent variable Chi Square

8.The Variable we are predicting is called the ____ or dependent variable. Standard deviation Mean square Criterion Independent variable Chi Square

9. We use X, also called the _____ to predict the value of Y. Hypotenuse Standard error Predictor Correlation Alpha level

9. We use X, also called the _____ to predict the value of Y. Hypotenuse Standard error Predictor Correlation Alpha level

10. Beta or b is the: Predictor Correlation coefficient Chi square Alpha level Slope

10. Beta or b is the: Predictor Correlation coefficient Chi square Alpha level Slope

11. The obtained statistic for a t-test is the t score, for a Chi Square test it is Chi Square. For Regression it is: Beta the Slope The sum of X Standard deviation The sum of squares All of the above.

11. The obtained statistic for a t-test is the t score, for a Chi Square test it is Chi Square. For Regression it is: Beta the Slope The sum of X Standard deviation The sum of squares All of the above.

Bonus: Did you hear the joke about the statistician who drowned while wading across a river whose average depth was three feet? What did the statistician forget to take into account? The standard deviation The correlation coefficient The median Inferential statistics

The standard deviation Bonus: Did you hear the joke about the statistician who drowned while wading across a river whose average depth was three feet? What did the statistician forget to take into account? The standard deviation The correlation coefficient The median Inferential statistics

The End