test: fix test case values

Signed-off-by: Gururaj Gurram <[email protected]>

Author: gururaj1512

lib/node_modules/@stdlib/stats/array/nanmean/test/test.js

@@ -95,7 +95,7 @@ tape( 'the function calculates the arithmetic mean of an array', function test(
 
 	x = [ 1.0, -2.0, -4.0, 5.0, 0.0, 3.0, NaN, NaN ];
 	v = nanmean( x );
-	t.strictEqual( v, 3.0, 'returns expected value' );
+	t.strictEqual( v, 0.5, 'returns expected value' );
 
 	x = [ -4.0, NaN, -5.0 ];
 	v = nanmean( x );
@@ -122,7 +122,7 @@ tape( 'the function calculates the arithmetic mean of an array (accessors)', fun
 
 	x = [ 1.0, -2.0, -4.0, 5.0, 0.0, 3.0, NaN, NaN ];
 	v = nanmean( toAccessorArray( x ) );
-	t.strictEqual( v, 3.0, 'returns expected value' );
+	t.strictEqual( v, 0.5, 'returns expected value' );
 
 	x = [ -4.0, NaN, -5.0 ];
 	v = nanmean( toAccessorArray( x ) );
@@ -158,7 +158,7 @@ tape( 'the function calculates the arithmetic mean of an array (array-like objec
 		'6': 3.0
 	};
 	v = nanmean( x );
-	t.strictEqual( v, 3.0, 'returns expected value' );
+	t.strictEqual( v, 0.5, 'returns expected value' );
 
 	t.end();
 });