Abstract
The efficiency of the Grubbs-Beck test and the multiple Grubbs-Beck tests to detect discordant observations are compared in this research using a few catchment areas of the Godavari river basin in Maharashtra, India. The Multiple Grubbs-Beck tests are proven to be more effective than the original Grubbs-Beck tests when applied to the Weibull distribution. When using the Grubbs test, only one lower discordant observation was identified in all of the river stations, and no lower discordant observation was found in the Somanpally river station when using the Multiple Grubbs Beck test (MGBT) five survey catchments.
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