1. Unit 12 Quiz: Review questions

2. Can you explain your answer?
Use your fingers to indicate your answer: 1=A, 2=B, 3=C, 4=D.
After viewing the question, show me your answer in 15 seconds.
Next, turn to your neighbor and you have one minute to convince him/her that you are right.

3. Dr. Larry Chuck teaches three sessions of data analysis: morning, afternoon, and evening. He wants to compare the test scores of these three groups. The proper statistical test is:
Three t-tests
One-way ANOVA
Three-way ANOVA
all of the above

4. In a typical ANOVA output there is a term called “error
In a typical ANOVA output there is a term called “error.” What does it mean?
That is the number of mistakes in the computational process.
That is the degree of within-group variability. When this variability is very high, this “error” hinders us from observing the group difference.
That is the degree of between-group variability. When this variability is very high, this “error” hinders us from observing the group difference.
That is the degrees of freedom, indicating how restrictive the analysis is due to the small sample size.

5. Give this information: Mean square between: 500; Mean square error: 10
Give this information: Mean square between: 500; Mean square error: 10. What is the F-ratio? 15 25 35 50

6. By doing multiple t-tests when there are more than 2 groups, we increase the risk of making _____
beta
false claim
Type II error
all of the above