The president of a university claimed that the entering class this year appeared to be larger than the entering class from previous years but their mean college entrance exam score Is lower than previous years. He took a sample of 20 of this year's entering students and found that their mean college entrance exam score is 1,501 with a standard deviation of 53. The university's record indicates that the mean college entrance exam score for entering students from previous years is 1,520. He wants to find out if his claim is supported by the evidence at a 5% level of significance Which of the following is the parameter that the president is interested in? A. The mean college entrance exam score of the entering students to all universities in the country this year. O B. The mean number of entering students to his university this year. O C. The mean number of entering students to all universities in the country this year. O D. The mean college entrance exam score of the entering students to his university this year. Click to select your