The effectiveness of an intervention to improve confidence in doing physical activity in men and women was studied as follows. A random sample of 100 married (male-female) couples was recruited. The intervention involved attending a day-long workshop. A quantitative measure of confidence was assessed in each participant before and after the workshop and the change in confidence score from before to after workshop calculated for each participant. The most appropriate test for comparing the impact of the workshop on confidence in men and women is a)One sample t-test b)Paired samples t-test c)Mann-Whitney test d)Independent samples t-test