fix: remove unnecessary diff

Author: aayush0325

lib/node_modules/@stdlib/stats/base/svariancech/src/main.c

@@ -58,15 +58,16 @@ float API_SUFFIX(stdlib_strided_svariancech)( const CBLAS_INT N, const float cor
 float API_SUFFIX(stdlib_strided_svariancech_ndarray)( const CBLAS_INT N, const float correction, const float *X, const CBLAS_INT strideX, const CBLAS_INT offsetX ) {
 	CBLAS_INT ix;
 	CBLAS_INT i;
-	float dN;
+	double dN;
+	double dM;
+	double n;
 	float mu;
 	float M2;
 	float M;
-	float n;
 	float d;
 
-	dN = (float)N;
-	n = dN - correction;
+	dN = (double)N;
+	n = dN - (double)correction;
 	if ( N <= 0 || n <= 0.0f ) {
 		return 0.0f / 0.0f; // NaN
 	}
@@ -78,7 +79,7 @@ float API_SUFFIX(stdlib_strided_svariancech_ndarray)( const CBLAS_INT N, const f
 	mu = X[ ix ];
 	ix += strideX;
 
-	// Compute the variance...
+		// Compute the variance...
 	M2 = 0.0f;
 	M = 0.0f;
 	for ( i = 1; i < N; i++ ) {
@@ -87,5 +88,6 @@ float API_SUFFIX(stdlib_strided_svariancech_ndarray)( const CBLAS_INT N, const f
 		M += d;
 		ix += strideX;
 	}
-	return (M2/n) - ((M/dN)*(M/n));
+	dM = (double)M;
+	return (float)((double)M2/n) - ( (float)(dM/dN) * (float)(dM/n) );
 }