Within one college class, 30 student evaluation ratings from mid-semester and the end of the semester were compared. The mean difference value was 0.71 with a sample standard deviation of 1.14. Calculate Cohen's d. Report your answer rounded to the nearest two decimal places. 5.Researchers were interested in the influence of yoga on reported stress levels in high school seniors. A sample of 29 high school seniors reported stress levels before (Time 1) and after (Time 2) a 30-minute yoga class. The mean difference value (x2x1) was 0.23, with a standard deviation of 1.25. Calculate the lower boundary of the 95% confidence interval. Report your answer rounded to the nearest two decimal places