what is the difference between chi and chi what is the test chi2 for evaluating the outcome from four times of data? how do i calculate the expected improvement when do you compare two independent variable in a chi what is the significance of the chi - 2 test what is a statistic used to compare two variables? what is the significance of using the chi  2 test? how to measure the proportion of events to bad results why chi x statistic is used for the proportion of good events to bad how to find what the value of expected improvement is how to determine whether a measure is good or bad what is the value of the chi how to tell if data is improved what is $chi2 used for what is the difference between a good and bad event chi and a statistic n what is the chi value for the event in the sample how to find the percentage of bad events vs. good events how to tell if a change in data has been significant what is the measure of a good-bad event why is chi 2 significant in statistics