refactor: improve error message

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Author: anandkaranubc

lib/node_modules/@stdlib/stats/incr/wmean/lib/main.js

@@ -117,7 +117,7 @@ function incrwmean() {
 			return mu;
 		}
 		if ( !isNonNegativeNumber( w ) ) {
-			throw new TypeError( format( 'invalid argument. Must provide a nonnegative number. Value: `%s`.', w ) );
+			throw new TypeError( format( 'invalid argument. Must provide a nonnegative weight. Weight: `%s`.', w ) );
 		}
 		if (w === 0.0) {
 			return ( FLG === void 0 ) ? null : mu;