STATBEAN Name: HypothesisTests
Purpose: Performs hypothesis testing in statistics for means, medians, standard deviations, proportions, and rates. Lets Statgraphics function as hypothesis testing software.
| Name | Type | Description | Possible Values | Default Value |
| alpha | double | Type I Error, as a percentage. | 0.0001-50.0 | 5.0 |
| alternativeHypothesis | String | Type of alternative hypothesis. | "Not equal", "Less than", "Greater than" |
"Not equal" |
| assumeEqualSigmas | boolean | Whether to assume equal sigmas if comparing 2 means. | true,false | true |
| class1Name | String | Name for first class to be used in title. | Any string. | "" |
| class2Name | String | Name for second class to be used in title. | Any string. | "" |
| missingValueExclusion | String | The method for handling records which contain missing values. | "Columnwise","Casewise", "Tablewise" |
"Columnwise" |
| nullHypothesis | double | The value of the null hypothesis. | Any double. | 1.0 |
| parameterOfInterest | String | Parameter to be tested. | "Mean", "Median", "Sigma", "Proportion", "Rate", "Difference of Means", "Ratio of Sigmas", "Difference of Proportions", "Difference of Rates", "Difference of Medians", "Difference of Distributions" |
"Mean" |
| sample1VariableName | String | The name of the column with data values for the first sample (if any). | Any string. | "" |
| sample2VariableName | String | The name of the column with data values for the first sample (if any). | Any string. | "" |
| sample1Mean | double | The mean of the first sample. | Any double. | Missing. |
| sample2Mean | double | The mean of the second sample. | Any double. | Missing. |
| sample1Proportion | double | The proportion for the first sample. | 0.0-1.0 | Missing. |
| sample2Proportion | double | The proportion for the second sample. | 0.0-1.0 | Missing. |
| sample1Rate | double | The rate for the first sample. | 0+ | Missing. |
| sample2Rate | double | The rate for the second sample. | 0+ | Missing. |
| sample1Sigma | double | The standard deviation of the first sample. | >0 | Missing. |
| sample2Sigma | double | The standard deviation of the second sample. | >0 | Missing. |
| sample1Size | int | The number of observations in the first sample. | 1+ | 0 |
| sample2Size | int | The number of observations in the second sample. | 1+ | 0 |
| signTest | boolean | Whether to use sign test rather than signed rank test if comparing 2 medians. | true,false | false |
| Name | Description | Arguments | Return Value |
| double getPValue() | Returns the P-Value for the test. | None | P-Value |
| double getTestStatistic() | Returns the value of the test statistic. | None | Test statistic |
Notes For Hypothesis Testing In Statistics
1. For tests involving means or standard deviations, the statistics may either be supplied directly in hypothesis testing software through methods such as setSample1Size or calculated from the data by specifying variable names. If specifying statistics directly, callcalculateStatistics(null). If providing data, make the HypothesisTests bean a listener for a StatDataSource.
2. For hypothesis testing in statistics involving medians, the data must be provided.
3. For hypothesis testing in statistics involving proportions or rates, the statistics must be provided and any data is ignored.
© 2025 Statgraphics Technologies, Inc.
The Plains, Virginia
CONTACT US
Have you purchased Statgraphics Centurion or Sigma Express and need to download your copy?
CLICK HERE
