Question

3. You may either use SPSS for this problem or carry it out using hand calculations Below are data for n = 20 individuals indicating the resting pulse rate of each person, and whether or not that person regularly exercises.

Exercise and pulse rate data

Person	Resting pulse rate	Regularly exercises
1	72	No
2	62	Yes
3	72	Yes
4	84	No
5	60	Yes
6	63	Yes
7	66	No
8	72	No
9	75	Yes
10	60	Yes
11	62	No
12	84	No
13	76	No
14	60	Yes
15	52	Yes
16	60	No
17	64	Yes
18	74	Yes
19	68	Yes
20	64	Yes

1. Compute and interpret the value of Cohen’s d (effect size). Note. The value of the pooled standard deviation is S_p = 7.74

Answer 1

d = abs(Xbar1- ybar)/Sp = (72-64.5)/7.74 = 0.96899

this means magnitude is large