2. (50%) To compare drug effects of two drugs that were developed to reduce sugar level, a group of volunteers were recruited (view that as a random sample). The researcher ask each volunteer to use one of the two drug in the first time of taking a drug, and use the other drug when the second time a drug is used. The amount of sugar reduction were recorded as the initial measure minus the sugar measure after one hour of using the corresponding drugs. Paired samples t test: of Sig. (2-tailed) pair 1 syearA-sugarB -2.213 27 0510 Independent samples t test Group Statistics drug Mean Std. Deviation Sid. Error Mean A 31 13.81 4.423 794 sugar B 41 14.71 3.502 547 Levene's Test for t-test for Equality of Means Equality of Variances F Sig df Sig. (2-tailed) Equal variances assumed 1.960 366 -1.965 27 0638 sugar Equal variances not assumed -1.934 25.775 0754 a) Choose the correct test