org.statcato.statistics.inferential.nonparametrics

Class SignTest

java.lang.Object

org.statcato.statistics.inferential.nonparametrics.SignTest

public class SignTest
extends java.lang.Object

Sign test. Determines the likelihood of observing a specified number of observations above and below the hypothesized median.

Since:

1.0

Field Summary

Fields

Modifier and Type	Field and Description
static int	GREATER Alternative hypothesis type: greater than
static int	LESS Alternative hypothesis type: less than
static int	NOTEQUAL Alternative hypothesis type: not equal to
static int	THRESHOLD Sample size threshold for for normal approximation to binomial

Constructor Summary

Constructors

Constructor and Description
SignTest(int numPositive, int numNegative, double testMedian, int testType) Constructor, given summary data.
SignTest(java.util.Vector<java.lang.Double> data, double testMedian, int testType) Constructor, given data values.

Method Summary

Modifier and Type	Method and Description
double	pValue() Returns the p-value.
java.lang.String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

LESS

public static int LESS

Alternative hypothesis type: less than

GREATER

public static int GREATER

Alternative hypothesis type: greater than

NOTEQUAL

public static int NOTEQUAL

Alternative hypothesis type: not equal to

THRESHOLD

public static int THRESHOLD

Sample size threshold for for normal approximation to binomial

Constructor Detail

SignTest

public SignTest(int numPositive,
                int numNegative,
                double testMedian,
                int testType)

Constructor, given summary data.

Parameters:

numPositive - number of positive signs

numNegative - number of negative signs

testMedian - hypothesized median

testType - type of alternative hypothesis

SignTest

public SignTest(java.util.Vector<java.lang.Double> data,
                double testMedian,
                int testType)

Constructor, given data values.

Parameters:

data - vector of double data values

testMedian - hypothesized median

testType - type of alternative hypothesis

Method Detail

pValue

public double pValue()

Returns the p-value. Uses the exact binomial probabilities if if the sample size (excluding sample equal to the hypothesized median) is less than or equal to the sample size threshold; otherwise, uses normal approximation to binomial.

Returns:

p-value

See Also:

THRESHOLD

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object