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Statistics PSY302 Regression Quiz
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1. The symbol used to represent the population correlation coefficient is:
Σ Μ β α ρ
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1. The symbol used to represent the population correlation coefficient is:
Σ Μ β α ρ
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2. When using correlation we have an alpha level of:
.10 .05 .0005 5.0 All of the above
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2. When using correlation we have an alpha level of:
.10 .05 .0005 5.0 All of the above
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3. Correlations work only when you are dealing with ___.
Causes Associations Categories Chi Squares Qualitative data
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3. Correlations work only when you are dealing with ___.
Causes Associations Categories Chi Squares Qualitative data
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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
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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
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5. The higher the absolute value of the correlation coefficient the ____ the prediction.
Worse More accurate More confusing Less confident All of the above
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5. The high the absolute value of the correlation coefficient the ____ the prediction.
Worse More accurate More confusing Less confident All of the above
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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
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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
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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
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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
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8.The Variable we are predicting is called the ____ or dependent variable.
Standard deviation Mean square Criterion Independent variable Chi Square
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8.The Variable we are predicting is called the ____ or dependent variable.
Standard deviation Mean square Criterion Independent variable Chi Square
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9. We use X, also called the _____ to predict the value of Y.
Hypotenuse Standard error Predictor Correlation Alpha level
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9. We use X, also called the _____ to predict the value of Y.
Hypotenuse Standard error Predictor Correlation Alpha level
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10. Beta or b is the: Predictor Correlation coefficient Chi square
Alpha level Slope
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10. Beta or b is the: Predictor Correlation coefficient Chi square
Alpha level Slope
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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.
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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.
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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
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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
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