A Statistics professor has observed that for several years students score an average of 118 points out of 150 on the semester exam. A salesman suggests that he try a statistics software package that gets students more involved withcomputers, predicting that it will increasestudents' scores. The software isexpensive, and the salesman offers to let the professor use it for a semester to see if the scores on the final exam increase significantly. The professor will have to pay for the software only if he chooses to continue using it. In the trial course that used thissoftware, 262 students scored an average of 121 points on the final with a standard deviation of 9.1 points. Determine the teststatistic, rounding to two decimal places.