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Flashcards based on lecture notes about statistical analysis.
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Which statistical analysis should be used with four groups (low/high income, each with/without a 6-week training), with weight as the continuous dependent variable?
A factorial ANOVA
What statistical test compares the average net worth of 20 randomly selected actors and 20 randomly selected actresses?
Independent samples t-test
Based on the ANOVA table (Mace, Eyewear, Mace x Eyewear), what can be concluded about the effects of Mace and eyewear on the dependent variable (DV)?
The effect of Mace on the DV depends on whether people were wearing eyewear or not.
Which experimental design represents a repeated measures design?
I have each kid in a classroom take a math test either in silence or with Mozart playing. I then have them take another math test later and switch conditions on them (i.e., if they listened to Mozart last time, they’ll work in silence this time and vice versa).
Given the ANOVA results for realtor sex and cookie scent on house sale prices, what can be concluded about the effects of each on sale prices?
Whether a house had a cookie scent sprayed in made a difference in how much the house eventually sold for (main effect of cookie smell).
What can be concluded from the chart regarding medication, therapy, and their interaction?
There is a medication by therapy interaction, but no main effects for either.
Based on the plot, what effects are likely present (Major: Liberal Arts vs. STEM; Sex: Men vs. Women)?
A major by sex interaction
Which of the two hypothetical graphs shows an interaction between gender and group (control vs. treated)?
The one on the right
What statistical test is most appropriate to test for the difference between 3 sample means (Placebo, 50mg, 100mg)?
A one-way ANOVA
All else being equal, in which scenario will there be more statistical power: separate groups or the same people in both control and experimental groups?
When I have the same 10 people do a task in the control group and the experimental group. (Two observations per person).
What statistical test should be used to analyze the change in people’s feelings of joy about life over the course of a semester?
A repeated measures ANOVA
As the F-value in an ANOVA gets higher…
The more likely that the null hypothesis will be rejected
When you perform multiple statistical tests on the same dataset, you risk __ your familywise error rate.
Increasing
What can you conclude from the ANOVA table?
The null hypothesis is probably false
The “Between Groups Sum of Squared Deviations” part of an ANOVA table represents…
The amount of the total variation in the dependent variable that is accounted for by knowing which group an observation came from.
What statistical test is appropriate to determine whether the average aggression score differed between groups(public/private school, boy/girl)?
A factorial ANOVA
To analyze the data for black and white film directors and male and female directors, it is necessary to use a factorial ANOVA. True or False?
True