Using traditional methods, it takes 108 hours to receive a basic driving license. a new license training method using computer aided instruction (cai) has been proposed. a researcher used the technique with 110 students and observed that they had a mean of 107 hours. assume the standard deviation is known to be 7. a level of significance of 0.02 will be used to determine if the technique performs differently than the traditional method. find the value of the test statistic. round your answer to 2 decimal places.