ANOVA, ANCOVA, Correlation & Regression

ANOVA testing is used for ...

• Test for one mean

• Test for two means

• Test for three or more means

• Test for independence between two variables

Determine whether the following scenario should use a one-way ANOVA test or two-way ANOVA test:

A researcher want to determine whether there is an interaction between physical activity level and gender on blood cholesterol concentration in children.

• one-way ANOVA test

• two-way ANOVA test

Determine whether the following scenario should use a one-way ANOVA test or two-way ANOVA test:

A group of psychiatric patients are trying three different therapies: counseling, medication and biofeedback. They want to see if one therapy is better than the others.

• one-way ANOVA test

• two-way ANOVA test

What would you use to determine whether significant differences were observed between all levels of your independent variable?

• Box-plots

• F statistic

• Post-hoc tests

• Descriptive statistics

How many independent and dependent variables are there in a One-Way Within Groups ANOVA?

• 1 independent variable and 1 dependent variable

• 2 independent variables and 1 dependent variable

• 1 independent variable and 3 dependent variables

• 1 independent variable and 2 dependent variable

Which type of correlation most likely represents the relationship between number of hours studied for an exam and the grade on the exam?

• Positive Correlation

• Negative Correlation

• No Correlation

Which type of correlation most likely represents the relationship between distance traveled to school and number of shirts owned?

• Positive Correlation

• Negative Correlation

• No Correlation

Which graph depicts the strongest positive correlation?

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What graph best shows correlation? 

• Bar Graph
  
• Histogram
• Ogive
• Scatterplot

What does r² tell us?

• How big the correlation is

• How strong the correlation is

• How much the x variable affects the y variable

• How much the y variable affects the x variable