docs: update parameter name in stdevpn documentation for clarity

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Author: gururaj1512

lib/node_modules/@stdlib/stats/base/stdevpn/README.md

@@ -98,9 +98,9 @@ The use of the term `n-1` is commonly referred to as Bessel's correction. Note,
 var stdevpn = require( '@stdlib/stats/base/stdevpn' );
 ```
 
-#### stdevpn( N, correction, x, stride )
+#### stdevpn( N, correction, x, strideX )
 
-Computes the [standard deviation][standard-deviation] of a strided array `x` using a two-pass algorithm.
+Computes the [standard deviation][standard-deviation] of a strided array using a two-pass algorithm.
 
 ```javascript
 var x = [ 1.0, -2.0, 2.0 ];
@@ -119,8 +119,6 @@ The function has the following parameters:
 The `N` and stride parameters determine which elements in the strided array are accessed at runtime. For example, to compute the [standard deviation][standard-deviation] of every other element in `x`,
 
 ```javascript
-var floor = require( '@stdlib/math/base/special/floor' );
-
 var x = [ 1.0, 2.0, 2.0, -7.0, -2.0, 3.0, 4.0, 2.0 ];
 
 var v = stdevpn( 4, 1, x, 2 );