# scipy.stats.ansari¶

scipy.stats.ansari(x, y)[source]

Perform the Ansari-Bradley test for equal scale parameters

The Ansari-Bradley test is a non-parametric test for the equality of the scale parameter of the distributions from which two samples were drawn.

Parameters: x, y : array_like arrays of sample data statistic : float The Ansari-Bradley test statistic pvalue : float The p-value of the hypothesis test

fligner
A non-parametric test for the equality of k variances
mood
A non-parametric test for the equality of two scale parameters

Notes

The p-value given is exact when the sample sizes are both less than 55 and there are no ties, otherwise a normal approximation for the p-value is used.

References

 [1] Sprent, Peter and N.C. Smeeton. Applied nonparametric statistical methods. 3rd ed. Chapman and Hall/CRC. 2001. Section 5.8.2.

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