A math teacher claims that she has developed a review course that increases the scores of students on the math portion of a college entrance exam. Based on data from the administrator of the exam, scores are normally distributed with u = 515. The teacher obtains a random sample of 2200 students, puts them through the review class, and nds that the mean math score of the 2200 students is 521 with a standard deviation of 119. Complete parts (a) through (d) below