Two Population Median Inference

Data Summary

Variable Cases read Cases missing Cases used Min Median Max
Post-Weight 72 0 72 71.3 84.05 103.6
Pre-Weight 72 0 72 79.6 82.3 94.9
[Post-Weight - Pre-Weight] 72 0 72 -12.2 1.65 21.5

Wilcoxon Signed-Rank Test of Difference in Location: [Post-Weight - Pre-Weight]

Sample size = 72
Median of differenced = 1.65

Null Hypothesis H0: Shift in Location '[Post-Weight - Pre-Weight]' is equal to 0
Alternative Hypothesis Ha: Shift in Location '[Post-Weight - Pre-Weight]' is not equal to 0

Method Test Stat. P-Value
Normal Approximation with CC 1724.5 0.0106022

Warning:

The Exact method was not used due to ties in the data.

This is a warning message!

Test of Hypothesis about Median of Differences: [Post-Weight - Pre-Weight]
Method: Sign Test

Null Hypothesis H0: Median of difference '[Post-Weight - Pre-Weight]' is equal to 0
Alternative Hypothesis Ha: Median of difference '[Post-Weight - Pre-Weight]' is not equal to 0

Sample Size Median of Diff. Number Below Number Equal Number Above P-Value
72 1.65 29 1 42 0.153913

Test is not significant at 5% level.

P-Value Graph: [Post-Weight - Pre-Weight]
Sign Test Using the Binomial Distribution

Null Density: Binomial; n = 71, p = 0.5
Alternative Hypothesis Ha: Median of '[Post-Weight - Pre-Weight]' is not equal to 0

  ,  The graph shows the distribution of   Number of observed deviations from the null value m0 = 0  ,  Observed value = 42 , P-Value = 0.15391 , P(X <= 29) + P(X >= 42)

Permutation Test of Median of Paired Differences: [Post-Weight - Pre-Weight]

Alternative Hypothesis Ha: Median of paired differences '[Post-Weight - Pre-Weight]' is not equal to 0
Number of replications = 10000; Random generator seed = 100

Median Obs Paired Diffs Median Permutation Paired Diff 2.5% Lower Critical Value 2.5% Upper Critical Value P-value
1.65 0.05 -1.4 1.3 0.0249975

Test is significant at 5% level.

Distribution of Permutation Replicates: Median of Paired Differences
[Post-Weight - Pre-Weight]

The title of the graph is  Distribution of Permutation Replicates: Median of Paired Differences
[Post-Weight - Pre-Weight]  ,  The graph shows the distribution of  Permutation Test  [Post-Weight - Pre-Weight]  ,  Obs. Median of Paired Diff = 1.65 , P-Value = 0.0249975 , Critical boundary for  alpha  =  5% , 
 Critical values = -1.4, 1.3 , Number of replications = 10000 , Random generator seed = 100