National research data suggests the number of shout out incidents in the typical elementary classroom is 14 per day. A sample of schools who use the verbal correction has the following number of out shout out incidents per day: 10, 13, 11, 13, 15, & 12. Use the appropriate test statistic to determine whether the verbal correction intervention significantly decreases the number of out of shout out behaviors per day. Test at = 0.05. Calculate Cohen's d as a measure of effect size