You conducted a 2-group independent t-test with MLTSRV as the grouping (independent) variable and TIPAMT as the dependent variable. The mean tip amount with single server, the mean tip value with multiple servers and the t-statistic were 2.06, 4.06 and -8.53. Given the t-statistic and the two means you would conclude Select one: a. TIPAMT was statistically higher when multiple servers were present b. Having multiple servers had no effect on the tip amount c. This is not a right test to conduct