Z-test alternative hypotheses.
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> Z-test alternative hypotheses.
``bash`
npm install @stdlib/stats-base-ztest-alternatives
`javascript`
var alternatives = require( '@stdlib/stats-base-ztest-alternatives' );
#### alternatives()
Returns a list of Z-test alternative hypotheses.
`javascript`
var out = alternatives();
// e.g., returns [ 'two-sided', 'less', 'greater' ]
The output array contains the following alternatives:
- two-sided: mean is not equal to the null hypothesis value.less
- : mean is less than the null hypothesis value.greater
- : mean is greater than the null hypothesis value.
`javascript
var contains = require( '@stdlib/array-base-assert-contains' ).factory;
var alternatives = require( '@stdlib/stats-base-ztest-alternatives' );
var isAlternative = contains( alternatives() );
var bool = isAlternative( 'two-sided' );
// returns true
bool = isAlternative( 'greater' );
// returns true
bool = isAlternative( 'beep' );
// returns false
`
*
`c`
#include "stdlib/stats/base/ztest/alternatives.h"
#### STDLIB_STATS_ZTEST_ALTERNATIVE
An enumeration of Z-test alternative hypotheses with the following fields:
- STDLIB_STATS_ZTEST_TWO_SIDED: mean is not equal to the null hypothesis value.
- STDLIB_STATS_ZTEST_LESS: mean is less than the null hypothesis value.
- STDLIB_STATS_ZTEST_GREATER: mean is greater than the null hypothesis value.
`c
#include "stdlib/stats/base/ztest/alternatives.h"
const enum STDLIB_STATS_ZTEST_ALTERNATIVE v = STDLIB_STATS_ZTEST_TWO_SIDED;
`
- Enumeration constants should be considered opaque values, and one should not rely on specific integer values.
*
This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
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---
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