Hypothesis Testing
This states that there is no difference, effect, or relationship between variables.
What is the Null Hypothesis (H0)?
An independent groups (independent samples) t-test compares _____ group means.
What is 2?
This is the measure of effect size for both an independent groups (independent samples) and repeated measures (paired samples) t-test.
What is Cohen's d?
This is the probability value that represents the likelihood of obtaining the observed result, or a more extreme one, if the Null Hypothesis is true.
What is the p-value?
This type of t-test is used when participants are tested under all conditions/levels of the I.V.
What is a repeated measures (paired samples) t-test?
Effect size represents this.
What is percentage of the D.V. explained by the I.V.?
This is a pre-determined threshold used to determine what results are “too unlikely” to occur by chance if the null hypothesis (H0) true.
What is the alpha-level (⍺)?
This assumption, required for an independent groups (independent samples) t-test, indicates that the variance for the D.V. should be approximately equal for both groups.
What is homogeneity of variance?
Effect size is a measure of this type __________ variance.
What is explained variance?
This type of error occurs when the researcher rejects a true null hypothesis (H0).
What is a Type I Error?
This test is used to determine homogeneity of variance for an independent groups (independent samples) t-test.
What is Levene's test?
Statistical power is primarily influenced by __________.
What is sample size?
When the p-value is less than the alpha-level (⍺), the researcher __________ the null hypothesis (H0).
What is reject?
When Levene's test has a p-value > .05, we have _____ the assumption of homogeneity of variance.
What is met?
This type of power analysis is done before a study to determine the minimum sample size required to determine an effect of a certain size.
What is an a priori power analysis.