D Question 4 1 pts This is a continuation of the previous question. The superintendent of the Smithville School District is concerned that the mean score on the SAT math test for students in her district may be below the national mean score of 528. She randomly selects 40 students from the district and finds that their mean score is 512 with a standard deviation of 75. A hypothesis test is to be run to test the claim that the mean SAT math score for students in this district is less than the national mean of 528. Calculate the test statistic (z-score) of this test. Round to the nearest hundredth (2 decimal places)