t-Tests
What is the main purpose of a t-test?
What is: to determine whether two means are significantly different
ANOVA is used when comparing:
What is: Three or more groups
Which post-hoc test is the most conservative?
What is: Scheffé
What does a p-value represent?
What is: The probability results occurred by chance
Coprastastaphobia is the fear of what
What is: Fear of constipation
What type of t-test compares a sample mean to a known population mean?
What is: A One-sample t-test
A larger F-ratio generally indicates:
What is: A greater chance that group means are different
Which post-hoc method adjusts the alpha level by dividing it by the number of comparisons?
What is: Bonferroni correction
A researcher compares three diet groups (low, moderate, high carb). What statistical test should they use?
What is: One-way ANOVA
Who sang about being an eggman and a walrus
What is: The Beatles
Multiple t-tests increase the likelihood of which error?
What is: A Type I error
In ANOVA, the grand mean is:
What is: The average of each group mean
Eta-squared is used to measure:
What is: Effect size in ANOVA
If a researcher compares pre- and post- a 6-week strength training program in the same athletes, which test is best?
What is: Dependent t-test
What movie is this quote from "Hallelujah! Holy sh*t! Where's the Tylenol?"
What is: Christmas Vacation
A dependent t-test is appropriate when:
What is: Measurements come from the same participants pre- and post-test
When F is not significant, what should researchers do?
What is: Stop; no post-hoc tests are needed
A researcher uses Tukey’s HSD. Which comparison is allowed?
What is: Only pairwise comparisons
A researcher uses the Bonferroni correction with α = 0.05 for 8 comparisons. What is the new alpha?
What is: 0.00625
What is the first rule of Fight Club?
What is: You do not talk about Fight Club
If a t-test is not significant but effect size is large, this suggests:
What is: A meaningful practical difference despite limited statistical power
A researcher compares four teaching interventions on exam performance using a one-way ANOVA and obtains F = 1.02, p = 0.39. What is the correct interpretation?
What is: No significant differences exist; post-hoc testing is unnecessary
Scheffé’s test is preferred when:
What is: if all possible comparisons are to be made
A researcher runs an ANOVA with 5 groups. Normality is slightly violated. Which is true?
What is: An F-test is robust and likely still accurate
He was a boy, she was a girl, can I make it any more obvious?
What is: Sk8er Boi