10 Questions
What type of variable is the dependent variable in the Mann-Whitney U test?
Ordinal
In the Wilcoxon signed-rank test, what is compared to determine a significant difference?
Paired observations
Which test is suitable for comparing test scores before and after attending an exam preparation course?
Wilcoxon signed-rank test
What type of variable is the independent variable in the Kruskall Wallis test?
Categorical
How many independent groups does the Kruskall Wallis Test compare?
Multiple
What distinguishes the Mann-Whitney U test from a t-test?
Paired vs. unpaired data
Which statistical test compares ranks of test scores instead of their actual values?
Mann-Whitney U test
'Observations from the same individuals under two different conditions or time points' describes what type of data collection method?
Longitudinal study
In the context of teaching methods comparison, which statistical test should be used for comparing three different teachers' impact on student test scores?
ANOVA
What kind of data is suitable for the Wilcoxon signed-rank test?
Paired observations under two conditions
Learn about dividing tests randomly into two halves using the odd-even approach, and how to estimate the correlation between the two halves. Explore the use of the Spearman-Brown formula for correcting half-length correlations and the measures of reliability like KR-20 for dichotomous items and Coefficient Alpha for non-dichotomous items.
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