bench: refactor random number generation in stats/base/dists/normal

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
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    status: passed
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---

Author: pranav-1720

lib/node_modules/@stdlib/stats/base/dists/normal/ctor/benchmark/benchmark.js

@@ -534,7 +534,6 @@ bench( pkg+':mgf', function benchmark( b ) {
 	for ( i = 0; i < len; i++ ) {
 		x[ i ] = uniform( 0.0, 1.0 );
 	}
-
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
 		y = dist.mgf( x[ i % len ] );
@@ -567,6 +566,7 @@ bench( pkg+':pdf', function benchmark( b ) {
 	for ( i = 0; i < len; i++ ) {
 		x[ i ] = uniform( -3.0, 3.0 );
 	}
+
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
 		y = dist.pdf( x[ i % len ] );

lib/node_modules/@stdlib/stats/base/dists/normal/mode/benchmark/benchmark.js

@@ -48,7 +48,7 @@ bench( pkg, function benchmark( b ) {
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		y = mode( mu[ i % 100 ], sigma[ i % 100 ] );
+		y = mode( mu[ i % len ], sigma[ i % len ] );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );
 		}

lib/node_modules/@stdlib/stats/base/dists/normal/pdf/benchmark/benchmark.js

@@ -84,7 +84,7 @@ bench( pkg+':factory', function benchmark( b ) {
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		y = mypdf( x[ i % 100 ] );
+		y = mypdf( x[ i % len ] );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );
 		}

lib/node_modules/@stdlib/stats/base/dists/normal/quantile/benchmark/benchmark.js

@@ -84,7 +84,7 @@ bench( pkg+':factory', function benchmark( b ) {
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		y = myquantile( p[ i % 100 ] );
+		y = myquantile( p[ i % len ] );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );
 		}