"T" Party
This type of t test is used when a researcher has one sample, knows the population mean, but does NOT know the population standard deviation.
What is a single-sample t test?
ANOVA is preferred over running multiple t tests because it does this to the overall risk of Type I error.
What is reduces/controls it (keeps the familywise error rate at alpha)?
If a researcher rejects the null hypothesis, they must consider the possibility of committing this type of error.
What is a Type I error?
This type of hypothesis states that there is no relationship between the variables being studied.
What is the null hypothesis?
If a 95% confidence interval for a paired-samples t test captures zero, this is the appropriate conclusion.
What is fail to reject the null hypothesis (the result is not statistically significant)?
A repeated-measures ANOVA is an extension of this type of t test.
What is a paired-samples t test?
In the F ratio, this term serves as the denominator.
What is MSWithin (mean square within-groups, also called MSResidual)?
Setting one's alpha level to a very low level (e.g., .001) increases the risk of committing this type of error.
What is a Type II error?
The formula for between-groups degrees of freedom uses this value minus one.
What is k?
Eta squared indicates the percentage of this.
What is the variance in the dependent variable that is accounted for (explained) by the independent variable?
A student affairs director has 29 students each experience both a student-created video and a live lecture, then tests their memory.
What is a paired-samples t test?
This is the minimum number of conditions (levels of the IV) required to run a repeated-measures ANOVA.
What is 3 (or 2 but can be done with a t-test as well)?
If a nonrobust assumption is violated in a repeated-measures design, this is what happens to the results.
What is the results cannot be trusted / the researcher should not proceed with the analysis?
This term describes variance that is primarily caused by individual differences.
What is within-group variability?
The abbreviation sM stands for this.
What is the estimated standard error of the mean?
If the observed value of a two-tailed, single-sample z test is 2.54 and the critical value is ±1.96, this is the most appropriate decision.
What is reject the null hypothesis? (The observed value exceeds the critical value.)
An ANOVA can only be used when outcome variables are measured at these two levels of measurement.
What are the interval and ratio scales (continuous/scale data)?
Dr. Schram wanted to match pairs by IQ AND have partners tested together in the same room during the experimental condition. She is in danger of violating this assumption for paired-samples t tests.
What is the independence of observations assumption?
When considering assumptions for a paired-samples t test, this is true about the normality assumption.
What is it is robust?
Cohen's d is an improper choice for reporting effect size in paired-samples t tests because it would do this to the effect size.
What is overestimate the effect size?
This happens to the t statistic as the difference between the sample mean and the population mean increases.
What is increase?
In the phrase "between-subjects one-way ANOVA," this specific term indicates that independent samples were analyzed.
What is between-subjects?
If a researcher violates the random samples assumption in a one-way repeated-measures ANOVA, this would be the major concern about the results.
What is the results may not generalize?
Daily Double!!!!
In a paired-samples t test, sMD represents this in the 95% confidence interval equation.
Dr. Jones reports the results of a one-way repeated-measures ANOVA as F(4, 16) = 1.84, p > .05. This is the decision she should make regarding the null hypothesis.
What is fail to reject the null hypothesis?