Understanding and Reporting a Wilcoxon Test

What is the primary purpose of a Wilcoxon test?

• To assess the correlation between two variables

• To compare means of two independent samples

• To test for a difference between two paired samples

• To determine the variance within a single sample

Which statistic is typically used to summarize non-parametric data in a Wilcoxon test report?

• Mean

• Standard deviation

• Median

• Variance

What does the p-value in a Wilcoxon test indicate?

• The size of the sample

• The magnitude of the effect

• The average difference between samples

• The probability of observing the data if the null hypothesis is true

How is the effect size 'r' calculated in a Wilcoxon test?

• By dividing the mean difference by the standard deviation

• By dividing the Z value by the square root of the number of observations

• By multiplying the p-value by the sample size

• By adding the test statistic to the p-value

Why might visual aids be included in a Wilcoxon test report?

• To replace the need for descriptive statistics

• To provide a visual representation of the data distribution

• To avoid using APA style formatting

• To increase the word count of the report