Problem 1
What is the null hypothesis tested by analysis of variance?
Problem 2
What are the assumptions of between-subjects analysis of variance?
Problem 3
What is a between-subjects variable?
Problem 4
Why not just compute t-tests among all pairs of means instead computing an analysis of variance?
Problem 8
What kind of skew does the F distribution have?
Problem 10
If an experiment is conducted with 5 conditions and 6 subjects in each condition, what are dfn and dfe?
Problem 11
How is the shape of the \(\mathrm{F}\) distribution affected by the degrees of freedom?
Problem 12
What are the two components of the total sum of squares in a one-factor between-subjects design?
Problem 14
An experimenter is interested in the effects of two independent variables on self-esteem. What is better about conducting a factorial experiment than conducting two separate experiments, one for each independent variable?
Problem 15
An experiment is conducted on the effect of age (5 yr, 10 yr and 15 yr) and treatment condition (experimental versus control) on reading speed. Which statistical term (main effect, simple effect, interaction, specific comparison) applies to each of the descriptions of effects. a. The effect of the treatment was larger for 15 -year olds than it was for 5 - or 10-year olds. b. Overall, subjects in the treatment condition performed faster than subjects in the control condition. c. The age effect was significant under the treatment condition. d. The difference between the 15 - year olds and the average of the 5 - and 10 year olds was significant. e. As they grow older, children read faster.
