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Statistical Comparison of Band Spectral Powers: An Aid in Stochastical Analysis of Brain Electrical Activity. Part 2: Construction of Confidence Intervals of Spectral Band Power and their Application in EEG-Analysis
Abstract
Based on the result that the distribution of estimated spectral power in broad frequency bands can be approximated by x2-distribution the accuracy of the approximation was tested by different models of stochastical processes. Two significance tests for comparison of spectral band powers on the basis of this approximation and the estimation of confidence intervals were developed and tested by application on EEG data. By means of these test statistics, a new basis for statistical comparison between EEG maps of groups as well as between maps of groups and single maps can be suggested.
