A research team wants to investigate the usefulness of relaxation training for reducing levels of anxiety in individuals experiencing strees. They identify 30 people at random from a group of 100 who have " High stress" jobs. The 30 people are divided into groups. One group acts as the control group- they receive no training. The second group of 15 receive the relaxation training. The subjects in each group are then given an anxiety inventory. The summarized results appear below where higher scores indicate greater anxiety.

Control

X=30

S=6.63

N=15

Relaxation

X=26

S6.20

N=15

Perform the appropriate hypothesis test using a significance level of 5%