... Differences Between Two Group Means•The t-test is used to compare differences between two means (remember: “t for two”).•But the types of t-test depends upon whether the two groups upon ... mean score on “likely” is different from non-subscribers’ mean on “likely,” we should use SPSS:•ANALYZE, COMAPRE MEANS, INDEPENDENT SAMPLES T-TEST (See p. 500.) Ch 17 33 Ch 17 25Using ... males vs. females, you would use INDEPENDENT SAMPLES t-test.•If the two groups are from the same sample, you would use PAIRED SAMPLES t-test. Testing for Differences Between Two Groups...