A criminal justice professor wants to see how well his current class is performing. The average grade in his current class of 49 students is 83. In the past 20 semesters that the professor has taught average performance in the class was 79 with a standard deviation of 16. Take this as a population value. He hypothesized that the main performance in his current class is greater than the previous classes that is his current class or genuinely smarter.

Calculate the test statistics