StatBean Name: ToleranceLimits

Purpose: Computes normal tolerance limits.

DataSource: Any.

Read/Write Properties

Name	Type	Description	Possible Values	Default Value
confidenceLevel	double	Level of confidence for the tolerance limits, as a percentage.	0.0001-99.9999	95.0
oneSided	boolean	Whether to compute one-sided rather than two-sided limits.	true,false	false
populationPercentage	double	Percentage at which tolerance limits are calculated.	0.0001-99.9999	99.73
tablewiseExclusion	boolean	Whether all rows of the data table containing a missing value in any column should be excluded from the plot.	true,false	false
xVariableName	String	The name of the column with the data.	Any string.	"X"

Other Public Methods

Name	Description	Arguments	Return Value
double getLowerToleranceLimit()	Returns the lower tolerance limit.	None.	Tolerance limit.
double getSampleMean()	Returns the sample mean.	None.	Mean.
double getSampleSigma()	Returns the sample standard deviation.	None.	Sigma.
int getSampleSize()	Returns the number of observations in the sample.	None.	Sample size n.
double getSigmaMultiple()	Returns the multiple of sigma used to calculate the limits.	None.	Multiple.
double getUpperToleranceLimit()	Returns the upper tolerance limit.	None.	Tolerance limit.

Code Sample

//create a datasource bean
FileDataSource fileDataSource1 = new STATBEANS.FileDataSource();

//set the file name to be read
fileDataSource1.setFileName("c:\\statbeans\\samples\\spc.txt");

//create a calculation bean
ToleranceLimits toleranceLimits1 = new STATBEANS.ToleranceLimits();

//set the name of the column containing the data
toleranceLimits1.setXVariableName("strength");

//set the population percentage
toleranceLimits1.setPopulationPercentage(99.99);

//make the calculation bean a listener for changes in the FileDataSource bean
fileDataSource1.addDataChangeListener(toleranceLimits1.listenerForDataChange);

//instruct the fileDataSource bean to read the file
fileDataSource1.readData();

//retrieve the limits
double lowerLimit=toleranceLimits1.getLowerToleranceLimit();
double upperLimit=toleranceLimits1.getUpperToleranceLimit();