jsc.tests
Class H1

java.lang.Object
  |
  +--jsc.tests.H1

public class H1

extends Object

Defines constants for simple alternative hypotheses in significance tests.

Version:

1.0

Author:

A. J. Bertie.

Field Summary

static H1	GREATER_THAN Indicates a one-sided test in which the alternative hypothesis is in some sense "greater than" compared to the null hypothesis.
static H1	LESS_THAN Indicates a one-sided test in which the alternative hypothesis is in some sense "less than" compared to the null hypothesis.
static H1	NOT_EQUAL Indicates a two-sided test in which the alternative hypothesis is in some sense "not equal" compared to the null hypothesis.

Method Summary

String	toString()
static Tail	toTail(H1 alternative) Common tail probability equivalent to alternative hypothesis.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

GREATER_THAN

public static final H1 GREATER_THAN

Indicates a one-sided test in which the alternative hypothesis is in some sense "greater than" compared to the null hypothesis. For example, in a one-sample test it indicates that the parameter is greater than that of the null hypothesis. In a two-sample test it could indicate that the parameter of population A is greater than that of population B, or that population A is stochastically greater than population B.

LESS_THAN

public static final H1 LESS_THAN

Indicates a one-sided test in which the alternative hypothesis is in some sense "less than" compared to the null hypothesis. For example, in a one-sample test it indicates that the parameter is less than that of the null hypothesis. In a two-sample test it could indicate that the parameter of population A is less than that of population B, or that population A is stochastically less than population B.

NOT_EQUAL

public static final H1 NOT_EQUAL

Indicates a two-sided test in which the alternative hypothesis is in some sense "not equal" compared to the null hypothesis. For example, in a one-sample test it indicates that the parameter is not equal to that of the null hypothesis. In a two-sample test it could indicate that the parameter of population A is not equal to that of population B, or that population A is stochastically not equal to population B.

Method Detail

toString

public String toString()

Overrides:

toString in class Object

toTail

public static Tail toTail(H1 alternative)

Common tail probability equivalent to alternative hypothesis. This is a convenience method for returning the type of tail probability that often (but not always) corresponds to a simple alternative hypothesis. Returns Tail.LOWER, Tail.TWO or Tail.UPPER if alternative is H1.LESS_THAN, H1.NOT_EQUAL or H1.GREATER_THAN respectively.

Parameters:

alternative - the alternative hypothesis.

Returns:

the tail type.