Name that stat technique
I wonder whether there is an interaction between gender and experimental condition on math test scores.
What is...factorial ANOVA
When the gender x experimental condition on math scores interaction was statistically significant.
What is...when controlling for the main effects of gender and experimental condition, the differences in means between experimental conditions depended on gender. This is true in the population as well.
I don't think your measure of happiness is an accurate measure of happiness.
What is...construct validity.
The p value in your independent t test is less than .01.
What is--the difference between the sample means did not occur by chance and there is a difference between these population means on the DV.
What is the formula for the observed F value? ?
What is...MSb divided by MSw.
I wonder whether students in China differ from students in the U.S. on how much time they spend doing homework when controlling for gender.
What is...factorial ANOVA.
When the main effect for experimental condition (talk therapy or drug therapy) on depression was statistically significant, but the main effect for gender was not.
What is...the differences in the sample means for for experimental condition on depression when controlling for gender was not due to chance, and the population means differ.
Students did better on the test at the end of the year because they took the same test earlier in the year, not because they learned anything in school.
What is...practice effect, which can harm internal validity.
The critical F value for your ANOVA is 3.27
What is--the value your observed F would need to exceed to be considered statistically significant.
The critical F value for an ANOVA with 4 groups and 10 cases per group and an alpha level of .01.
What is...4.38.
I wonder how much of the variance in Happiness scores is explained by marital status (married, single, or divorced).
What is...eta squared, the effect size for oneway ANOVA.
Mystery question!
What is...the sample mean of 3rd gen students is significantly lower than the sample means of 1st and 2nd gen students, but there is no difference between the sample means of 2nd and 3rd gen. The population mean of 3rd gen is lower than the pop means of 1st and 2nd gen on whatever this variable is.
I don't think your results will generalize to the broader population because you used a convenience sample.
What is...external validity?
The eta squared.
What is...how much of the variance in the dependent variable is explained by an independent variable.
A research question you would answer using a factorial ANOVA.
What is...any research question with one interval/ratio dependent variable and two categorial, independent variables.
I wonder whether daughters are taller or shorter than their mothers, on average?
What is...dependent t test, 2-tailed
When the standardized regression coefficient for age predicting running speed is -.45, is statistically signfiicant, and a second predictor is weight.
What is...When controlling for weight, age is a medium-sized, negative, statistically significant predictor of running speed, and this relationship exists in the population.
Students in the music condition did better because they figured out this was the researcher's hypothesis so they tried harder.
What is...Hawthorne effect.
Coefficient of determination.
What is...in a correlation analysis, the r-squared indicates the percentage of variance in one variable that is explained by the other.
The MSe if the SSe is 250 and you have four groups with 25 members in each group.
What is...(25 x 4) - 4 = 96. This is the dfe
MSe = 250/96 = 2.60
What is a better predictor of college GPA: high school GPA, overall SAT score, or family socioeconomic status?
What is...multiple regression.
When the observed F value exceeds the critical F value for your comparison of how much time dogs, cats, and pet rabbits spend sleeping each day.
What is...there is a significant difference between the sample means of dogs, cats, and rabbits on time spent sleeping. This tells us the population means differ somewhere, but we don't know where yet.
How can you say high self-esteem causes higher academic achievement when self-esteem isn't even related to achievement?
What is...statistical validity?
The alpha level.
What is...the percentage of time you are willing to be wrong when you decide a result was NOT due to chance, but it really was.
"I'm taking the short final."
"What is...I'm content with the grades I got on the first four quizzes and I'm ready to be done."