Two groups were given an attitude test on capital punishment for sex offenders. Group B had watched a film favourable to the subject of capital punishment while group A had not. Their scores are recorded below: A 16 18 20 24 24 22 20 18 10 8 20 B 24 20 24 28 30 20 24 22 18 18 24 Test the significance of the difference between the attitudes of the two groups at the .05 significance level