docs: fix typos and missing require in mediansorted packages

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---

Author: Planeshifter

lib/node_modules/@stdlib/stats/base/ndarray/dmediansorted/docs/types/index.d.ts

@@ -23,7 +23,7 @@
 import { float64ndarray } from '@stdlib/types/ndarray';
 
 /**
-* Computes the median value of a sorted one-dimensional single-precision floating-point ndarray.
+* Computes the median value of a sorted one-dimensional double-precision floating-point ndarray.
 *
 * @param arrays - array-like object containing a sorted input ndarray
 * @returns median value

lib/node_modules/@stdlib/stats/base/ndarray/dmediansorted/docs/types/test.ts

@@ -24,7 +24,7 @@ import dmediansorted = require( './index' );
 
 // TESTS //
 
-// The function returns a ndarray...
+// The function returns a number...
 {
 	const x = zeros( [ 10 ], {
 		'dtype': 'float64'

lib/node_modules/@stdlib/stats/base/ndarray/smediansorted/docs/types/test.ts

@@ -24,7 +24,7 @@ import smediansorted = require( './index' );
 
 // TESTS //
 
-// The function returns a ndarray...
+// The function returns a number...
 {
 	const x = zeros( [ 10 ], {
 		'dtype': 'float32'

lib/node_modules/@stdlib/stats/base/ndarray/smediansorted/lib/index.js

@@ -24,6 +24,7 @@
 * @module @stdlib/stats/base/ndarray/smediansorted
 *
 * @example
+* var Float32Array = require( '@stdlib/array/float32' );
 * var ndarray = require( '@stdlib/ndarray/base/ctor' );
 * var smediansorted = require( '@stdlib/stats/base/ndarray/smediansorted' );
 *