when do subject scores increase what is the measure of variance of a test score? what's a good measure of spread near the threshold? what is a threshold for variance why is the threshold used for variance what is a good measure of variance? what is the threshold to test for what is the threshold range what's a good measure of variance what is the threshold for variation which statistic is used to calculate variance is a threshold a measure of the variability of test scores? is a threshold a good measure of variability what is a threshold in variance can you test variance by threshold what is a good measure of variance what is a good measure for variance how to assess variance of a test how to determine the spread of variance what is a good measure of variation near a threshold?