Mann whitney U

About

The non-parametric equivalent of the t-test, this procedure tests whether two independent groups have been drawn from the same population.

Requires

Y variables and X variables to be compared. Matched Y and X variables are allowed, see below.

Feature

Two separate variables can be compared with one or more main filters selected if desired (as with other tests).

To compare two groups of observations within the same variable, first set the X variables and Y variables to the same Column(s), then use the X filter and Y filter to select the desired observations.

Parameters

Mann Whitney U dialog

Variables

Select one or more Y variables and one or more X variables (See Selecting variables for details). Output will be produced for each pair of Y and X variables, dependant on the block mode selected.

Block Mode

Defines how the Y variables and X variables are compared. (See Performing multiple analyses for details)

Options

Y filter

Allows a filter to be specified that will select rows for the Y variable.

X filter

Allows a filter to be specified that will select rows for the X variable.

Subtitle

Allows you to specify an optional subtitle which will be included in the statistical output.

Buttons

?

Opens the help system for this dialog.

Dataset…

Sends the output from this analysis to a new OxonStat Dataset. See Dataset output for more details.

Print…

Sends the output from this analysis to a printer.

Cancel

Cancels the analysis and closes the dialog.

Screen…

Displays the output from this analysis in the Results window.

Sample Output

OxonStat

20:38, 12 Aug 2023

Compare:	Weight_1 and Weight_1
Subtitle:	<none>
Statistic:	Mann Whitney U
Dataset:	OxonStat Demo
Range:	Row 1 [Green] to Row 38 [Hall]
Filter:	<no filter>
	(10 groups of ties)

Variable	Weight_1	Weight_1
Last Filter	Gender : = Male	Gender : = Female
	Gender = 1	Gender = 2
Count	28 of 28	10 of 10
Rank Sum	562	179
Mean Rank	20	18

U	U Prime
124.0	156.0

	z	p
	-0.5304	0.5949
Corrected for ties	-0.5313	0.5943

OxonStat

20:38, 12 Aug 2023

Compare:	Weight_1 and Height
Subtitle:	<none>
Statistic:	Mann Whitney U
Dataset:	OxonStat Demo
Range:	Row 1 [Green] to Row 38 [Hall]
Filter:	<no filter>
	(10 groups of ties)

Variable	Weight_1	Height
Last Filter	Gender : = Male	Gender : = Female
	Gender = 1	Gender = 2
Count	28 of 28	10 of 10
Rank Sum	406	335
Mean Rank	14	34

U	U Prime
0.0	280.0

	z	p
	-4.6410	<0.0001
Corrected for ties	-4.6473	<0.0001

OxonStat

20:38, 12 Aug 2023

Compare:	Height and Weight_1
Subtitle:	<none>
Statistic:	Mann Whitney U
Dataset:	OxonStat Demo
Range:	Row 1 [Green] to Row 38 [Hall]
Filter:	<no filter>
	(8 groups of ties)

Variable	Height	Weight_1
Last Filter	Gender : = Male	Gender : = Female
	Gender = 1	Gender = 2
Count	28 of 28	10 of 10
Rank Sum	674	66
Mean Rank	24	7

U	U Prime
11.5	268.5

	z	p
	-4.2597	<0.0001
Corrected for ties	-4.2658	<0.0001

OxonStat

20:38, 12 Aug 2023

Compare:	Height and Height
Subtitle:	<none>
Statistic:	Mann Whitney U
Dataset:	OxonStat Demo
Range:	Row 1 [Green] to Row 38 [Hall]
Filter:	<no filter>
	(9 groups of ties)

Variable	Height	Height
Last Filter	Gender : = Male	Gender : = Female
	Gender = 1	Gender = 2
Count	28 of 28	10 of 10
Rank Sum	666	76
Mean Rank	24	8

U	U Prime
20.5	259.5

	z	p
	-3.9614	<0.0001
Corrected for ties	-3.9699	<0.0001

Mann whitney U

About

Requires

Feature

Parameters

Variables

Block Mode

Options

Y filter

X filter

Subtitle

Filters

Buttons

?

Dataset…

Print…

Cancel

Screen…

Sample Output