Alias: null
Common Name: Student t Test
Class: org. imirsel. m2k. evaluation. StudentTTest

Overview: This module takes in a stream of Signal arrays and compares them with Studen t-test.

Detailed Description: This module reads in a stream of Signal arrays with "Performance" metadata arrays.These arrays must be of the same length in all examples and should have all been calculated on the same data set.

The "Performance" metadata is used to perfrom the t-test, which is a standard test to see if the means of two populations are significant different.

Test result is stored in a file with ".ttest" extension in specified output directory.

Ported from Chris Buckley and Jeremy Pickens' TREC code, written by Xiao Hu (xiaohu@uiuc.edu)

Data Handling: The input data is not modified.
Inputs:
Signal arrays
[org. imirsel. m2k. util. Signal
Signal arrays to be tested with Student t test (must have Statistics metadata set by an evaluator module)

Outputs:
Properties:
Verbose output
Determines whether debugging information is output to the console.

Evaluation name
The name of the evaluation being conducted (e.g. onset detection algorithms), used to crearte the name of the output file.

Output Directory
Directory to save the output file to.