Club drug use was highly prevalent in the NYC afterhours nightclub scene in the early 2000s. We assessed 450 gay and bisexual men four times over a year (in the early 2000s) about their club drug use. We surveyed about use of the following five drugs: crystal meth, ecstasy, ketamine, GHB and cocaine. Below are the means of use of each drug for the men in this sample who reported use at Time 1 and at Time 2 (Month 12). We want to know whether level of use ("number of days used in the previous four months") changed over time (for each of the five drugs). We hypothesize that use changed over time, but we aren't sure about specific direction. So we are interested in whether there are changes in use of each of the five drugs between the two time points, separately. Paired Samples Statistics Mean Sid. Deviation Sid. Error Mean crystal 1 3.05 93 8,642 896 Pair 1 crystal 12 10.10 93 14.356 1.489 ecstasy1 5.1 253 7.651 481 Pair 2 ecstasy12 2.47 253 6.301 396 ketamine1 11.43 58 10.277 1.349 Pair 3 ketamine12 8.2 58 14.566 1.913 ghb 1 10.63 16 17. 161 4.290 Pair 4 ghb12 188 16 7.060 1.765 coke1 21.95 162 25. 165 1.977 Pair 5 coke12 162 20.593 1618 Paired Samples Test Paired Differences Sig. (2- Mean Std. Std. Error 95% Confidence Interval of tailed ) Deviation Mean the Difference Lower Upper Pair 1 crystal1 - crystal12 -1.043 15.141 1.570 4.161 2.075 .66 92 508 Pair 2 ecstasy1 - ecstasy12 2.636 8.077 508 636 3.636 5.192 252 000 Pair 3 ketamine1 - ketamine12 3.138 15.897 2.08 -1.042 7.318 .503 57 138 Pair 4 ghb1 - ghb12 5.750 11 958 2.990 .622 2.122 1.923 15 074 Pair 5 coke1 - coke12 6.636 26.543 2.085 2.517 10.754 3.18 161 Question 2 (1 point) What type of test/tests was/were used? One Way ANOVA Independent sample t-tests Paired sample t-tests Two-Way ANOVA