docs: add examples

lib/node_modules/@stdlib/stats/anova1/lib/main.js

@@ -52,6 +52,13 @@ var prettyPrint = require( './print.js' );
 * @throws {RangeError} length of `x` must be greater than or equal to two
 * @throws {RangeError} `x` and `factor` must have the same length
 * @returns {Object} test results
+*
+* @example
+* var x = [ 1, 3, 5, 2, 4, 6, 8, 7, 10, 11, 12, 15 ];
+* var f = [ 'control', 'treatA', 'treatB', 'treatC', 'control', 'treatA', 'treatB', 'treatC', 'control', 'treatA', 'treatB', 'treatC' ];
+*
+* var out = anova1( x, f );
+* // returns {...}
 */
 function anova1( x, factor, options ) {
 	var meanSumSqTreat; // Mean sum of squares

lib/node_modules/@stdlib/stats/binomial-test/lib/main.js

@@ -84,6 +84,17 @@ function upper( x, n, alpha ) {
 * @throws {TypeError} alternative option has to be a string
 * @throws {Error} alternative option must be `two-sided`, `less` or `greater`
 * @returns {Object} test results
+*
+* @example
+* var out = binomialTest( 682, 925 );
+* // returns {...}
+*
+* @example
+* var out = binomialTest( 682, 925, {
+*     'p': 0.75,
+*     'alpha': 0.05
+* });
+* // returns {...}
 */
 function binomialTest() {
 	var alpha;

lib/node_modules/@stdlib/stats/ttest2/lib/main.js

@@ -60,6 +60,13 @@ var print = require( './print.js' ); // eslint-disable-line stdlib/no-redeclare
 * @throws {TypeError} variance option has to be a string
 * @throws {Error} variance option must be `equal` or `unequal`
 * @returns {Object} test result object
+*
+* @example
+* var x = [ 0.7, -1.6, -0.2, -1.2, -0.1, 3.4, 3.7, 0.8, 0.0, 2.0 ];
+* var y = [ 1.9, 0.8, 1.1, 0.1, -0.1, 4.4, 5.5, 1.6, 4.6, 3.4 ];
+*
+* var out = ttest2( x, y );
+* // returns {...}
 */
 function ttest2( x, y, options ) {
 	var stderr;

lib/node_modules/@stdlib/stats/ztest2/lib/main.js

@@ -63,6 +63,13 @@ var normCDF = cdfFactory( 0.0, 1.0 );
 * @throws {TypeError} must provide valid options
 * @throws {Error} `alternative` option  must be either `two-sided`, `less`, or `greater`
 * @returns {Object} test result object
+*
+* @example
+* var x = [ 2.66, 1.5, 3.25, 0.993, 2.31, 2.41, 1.76, 2.57, 2.62, 1.23 ];
+* var y = [ 4.88, 2.93, 2.96, 4.5, -0.0603, 4.62, 3.35, 2.98 ];
+*
+* var out = ztest2( x, y, 1.0, 2.0 );
+* // returns {...}
 */
 function ztest2( x, y, sigmax, sigmay, options ) {
 	var stderr;