Psychological statistics help 1. The chi-squared statistic can be applied to two
ID: 3062409 • Letter: P
Question
Psychological statistics help
1. The chi-squared statistic can be applied to two situations. You can use a ____?_____ to check whether a single categorical variable is distributed the way you expect, or you can
use a ___?___ to check whether 2 or more categorical variables are associated with each other.
2. Match the following to the correct test:
a Wilcoxon signed-rank test
a Kruskal-Wallis test
a Wilcoxon rank-sum test
-If you have a continous outcome that is not normal, then instead of using a paired-samples t test to compare means, you can use _____ to compare medians.
-If you have a continous outcome that is not normal, then instead of using a independent-samples t test to compare means, you can use _____ to compare medians.
-If you have a continous outcome that is not normal, then instead of using a one-way ANOVA to detect group differences in means, you can use _____ to detect groups differences in medians
A.a Wilcoxon signed-rank test
B.a Kruskal-Wallis test
C.a Wilcoxon rank-sum test
Explanation / Answer
1) The chi-squared statistic can be applied to two situations. You can use a GOODNESS OF FIT to check whether a single categorical variable is distributed the way you expect, or you can use a INDEPENDENCE OF ATTRIBUTES to check whether 2 or more categorical variables are associated with each other.
2) If you have a continous outcome that is not normal, then instead of using a paired-samples t test to compare means, you can use WILCOXON SIGNED -RANK TEST to compare medians.
-If you have a continous outcome that is not normal, then instead of using a independent-samples t test to compare means, you can use WILCOXON RANK SUM TEST to compare medians.
-If you have a continous outcome that is not normal, then instead of using a one-way ANOVA to detect group differences in means, you can use KRUSKAL WALLIS TEST to detect groups differences in medians.
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