g for employees lo help lower their average call times. The manager would like to determine whemer the average call time before training differs from the average call time after training. Which measure should this manager use to decide if the training was effective? 0 Median compared to the mode 0 T-statistic compared to the tcritical value 0 Variance compared to the standard deviation 0 Zscore compared to the P value TIMELEFF.' 01.33907