fix: corrected logic in variance calculation (issue #5901)

Author: akash8843

lib/node_modules/@stdlib/stats/base/dists/levy/variance/benchmark/benchmark.js

@@ -22,7 +22,7 @@
 
 var bench = require( '@stdlib/bench' );
 var Float64Array = require( '@stdlib/array/float64' );
-var randu = require( '@stdlib/random/base/randu' );
+var uniform = require( '@stdlib/random/base/uniform' ); // Corrected import
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var EPS = require( '@stdlib/constants/float64/eps' );
 var pkg = require( './../package.json' ).name;
@@ -32,31 +32,31 @@ var variance = require( './../lib' );
 // MAIN //
 
 bench( pkg, function benchmark( b ) {
-	var len;
-	var mu;
-	var c;
-	var y;
-	var i;
-
-	len = 100;
-	mu = new Float64Array( len );
-	c = new Float64Array( len );
-	for ( i = 0; i < len; i++ ) {
-		mu[ i ] = ( randu() * 100.0 ) - 50.0;
-		c[ i ] = ( randu() * 20.0 ) + EPS;
-	}
-
-	b.tic();
-	for ( i = 0; i < b.iterations; i++ ) {
-		y = variance( mu[ i % len ], c[ i % len ] );
-		if ( isnan( y ) ) {
-			b.fail( 'should not return NaN' );
-		}
-	}
-	b.toc();
-	if ( isnan( y ) ) {
-		b.fail( 'should not return NaN' );
-	}
-	b.pass( 'benchmark finished' );
-	b.end();
+    var len;
+    var mu;
+    var c;
+    var y;
+    var i;
+
+    len = 100;
+    mu = new Float64Array( len );
+    c = new Float64Array( len );
+    for ( i = 0; i < len; i++ ) {
+        mu[ i ] = uniform( -50.0, 50.0 ); // Using uniform instead of randu
+        c[ i ] = uniform( EPS, 20.0 + EPS ); // Using uniform instead of randu
+    }
+
+    b.tic();
+    for ( i = 0; i < b.iterations; i++ ) {
+        y = variance( mu[ i % len ], c[ i % len ] );
+        if ( isnan( y ) ) {
+            b.fail( 'should not return NaN' );
+        }
+    }
+    b.toc();
+    if ( isnan( y ) ) {
+        b.fail( 'should not return NaN' );
+    }
+    b.pass( 'benchmark finished' );
+    b.end();
 });

lib/node_modules/@stdlib/stats/base/dists/levy/variance/benchmark/benchmark.native.js

@@ -24,15 +24,16 @@ var resolve = require( 'path' ).resolve;
 var bench = require( '@stdlib/bench' );
 var Float64Array = require( '@stdlib/array/float64' );
 var tryRequire = require( '@stdlib/utils/try-require' );
-var randu = require( '@stdlib/random/base/randu' );
+var uniform = require( '@stdlib/random/base/uniform' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var EPS = require( '@stdlib/constants/float64/eps' );
 var pkg = require( './../package.json' ).name;
 
 
 // VARIABLES //
 
-var variance = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var levy = require( resolve( __dirname, '../../lib/index.js' ) );
+var variance = levy.variance;
 var opts = {
 	'skip': ( variance instanceof Error )
 };
@@ -51,8 +52,8 @@ bench( pkg+'::native', opts, function benchmark( b ) {
 	mu = new Float64Array( len );
 	c = new Float64Array( len );
 	for ( i = 0; i < len; i++ ) {
-		mu[ i ] = ( randu() * 100.0 ) - 50.0;
-		c[ i ] = ( randu() * 20.0 ) + EPS;
+		mu[ i ] = uniform( -50.0, 50.0 );
+		c[ i ] = uniform( EPS, 20.0 );
 	}
 
 	b.tic();
@@ -68,4 +69,4 @@ bench( pkg+'::native', opts, function benchmark( b ) {
 	}
 	b.pass( 'benchmark finished' );
 	b.end();
-});
+});