Wilcoxon Signed Rank Test

  • The Wilcoxon Signed Rank Test assumes that our sample is an SRS and will give trustworthy conclusions only if this condition is met.

  • The Wilcoxon Signed Rank Test assumes that your data come from a continuous distribution.

  • The Wilcoxon Signed Rank Sum Test is an alternative to the one-sample $t$-test when the guidelines for its use are not met (such as when the data is strongly skewed or has outliers).

Sample data goes here (enter numbers in columns):
Null Hypothesis:$H_0: M=M_0=$
Alternative Hypothesis:$H_a:M$ $M_0$
Level of Significance: $\alpha=$

Sample Size: $n=$
Sample Median: $M=$
$W^{+}$ statistic: $W^{+}=$
Mean of $W^{+}$ under $H_0$:$\mu_{W^{+}}=$
Standard Deviation of $W^{+}$ under $H_0$ (with tie correction): $\sigma_{W^{+}}=$
$z$ Value for Test (with continuity correction): $z=$
Critical $z$ Value: $z^{*}=$
$p$-value: $p=$