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Worksheetst-test
Total questions: 6
Worksheet time: 4mins
The p-value was .23 for an independent t-test that compared two means. What does this p-value indicate?
The two means are different from each other.
The two means are no different from each other.
The magnitude of the effect was small.
The independent t-test can be used for outcome variables that are... (select all that apply)
Interval
Ratio
Ordinal
Nominal
The magnitude of an effect is estimated by the...
p-value
95% confidence interval
Cohen's d
Levene's test
The assumption of homoscedasticity is checked by...
Creating a histogram for the outcome variable
Creating a histogram for the outcome variable for each predictor category.
Running a Levene's test
When is it important to take the weighted average of the variances between groups?
When you have unequal sample (group) sizes
When you have equal sample (group) sizes
You can always take the weighted average
True or False. Wider confidence intervals indicate that our results our precise or trustworthy. Narrow confidence intervals suggest our estimates may be inaccurate.
True
False
