One-Way ANOVA
What does ANOVA stand for?
Analysis of Variance
What is the main difference between a One-Way and Two-Way ANOVA?
A One-Way has one IV; a Two-Way has two IVs
What is the null hypothesis of a dependent groups t-test?
The two sample means come from populations with the same mean
What is the typical confidence level used when constructing confidence intervals?
95%
Why would someone conduct a One-Way ANOVA?
To compare the means of 2 or more groups to determine whether the population means are likely to be the same
How many effects are there in a Two-Way ANOVA?
Three; one for each main effect and the interaction effect
Which type of test is used when there is an experimental group tested in two conditions?
Dependent groups t-test
What is a confidence interval?
A range of values that represents where the population parameter is most likely to lie.
How is an F-statistic calculated?
The ratio of the between group variance to the within group variance
What is the meaning of moderation?
When the effect of one IV on your DV depends on a second IV
What level of measurement for the DV is suitable for an independent samples t-test?
interval or equal ratio variables
What is the formula for calculating a confidence interval for a one-sample t-test?
LL = mean - t(critical value) * estimated standard error
UL = mean + t(critical value) * estimated standard error
What is a possible test one would have to conduct after a One-Way ANOVA? Under what circumstances is it necessary?
Post-Hoc Test; when we reject the null hypothesis for the overall test
Describe what a path diagram would look like for a Two-Way ANOVA and what the arrows mean
A horizontal arrow pointing from the IV to the DV and a vertical arrow from the moderating IV pointing down to the horizontal arrow; the arrows represent the direction of the effect ("effector" pointing to "effected")
What is an important assumption when conducting an independent t-test?
Homogeneity of variances; the variances of the two groups are approximately equal
How do you interpret a 95% confidence interval?
If the experiment were repeated many times over, 95% of the intervals constructed would include the population parameter