In a Wilcoxon Signed-Rank Test, the Test Statistic Is Calculated

question 23

Multiple Choice

In a Wilcoxon signed-rank test, the test statistic is calculated as T = 75. If there are n = 15 observations for which the difference is not 0, and a two-tailed test is performed at the 5% significance level, what is an appropriate conclusion?

• A) Reject the null hypothesis.
• B) Don't reject the null hypothesis.
• C) The test results are inconclusive.
• D) Perform a parametric test.

---

Definitions:

Skew

An indicator of how much the probability distribution of a real-valued random variable deviates from being symmetrical.

Sigma

A symbol used in statistics to represent the standard deviation of a population or summing operations.

Sample Size

Refers to the number of individuals or observations included in a sample, which represents a subset of the larger population.

N

Represents the sample size or the number of observations in a dataset.