Psyc 210 E3 Review

Why can't multiple t tests be run when there are more than 2 levels?

• the probability of making a type II error in one of the test increases

• the probability of making a type I error in one of the test increases

• degrees of freedom are lost

• it becomes more difficult to reject the null hypothesis

How is the F ratio calculated?

• squaring all the scores

• averaging the results from the t test for all possible two-group comparisons

• dividing a measure of between-groups variability by a measure of within-groups variability

• dividing a measure of within-groups variability by a measure of between-groups variability

ANOVA is used when...

• given a scale dependent variable and a nominal independent variable with three or more levels

• we know the population standard deviation

• when we do not know the population standard deviation

• when we can use categorical data

What are the assumptions of ANOVA?

• random selection of all samples

• homoscedasticity

• independent variable has only three levels

• normally distributed sample

An F statistic calculated on 4 and 45 degrees of freedom equals 3.62. Which decision should be made about a hypothesis tested at the p = 0.01 level?

• fail to reject the null hypothesis and conclude there are differences among the groups

• fail to reject the null hypothesis and conclude there are no significant differences among the groups

• reject the null hypothesis and conclude there are differences among the groups

• reject the null hypothesis and conclude there are no significant differences among the groups

What is R² for these data?

Evaluate responses using AI:

OFF

What is an example of a post hoc test?

• Scheffe

• Cohen's d

• eta squared (η²)

• Pearson's r

How do you calculate Bonferroni?

• find the true significant difference

• determine the amount of difference you should have between each of your means based on a p levels of 0.01

• divide desired significance level by two and use the result as the p level for each comparison

• divide desired significance level by the number of comparisons being made

Repeated measures ANOVA is also known as...

• single samples

• multiple groups

• a one way within-groups ANOVA

• a one way between-groups ANOVA

A two-way ANOVA includes is used when there is(are) ____ independent variable(s) with ___ dependent variable

• 1; scale

• 2; scale

• 1; discrete

• 2; discrete