Cassandra has been researching preparation courses for the Graduate Writing Test. They are expensive courses and she wants to select the course associated with the best outcome (that is, higher test scores). The first course she researched (Course A) reported a mean score of M = 72 with a standard deviation of s = 15 for their graduates. The web page for the second course (Course B) only provided a sample of scores for their most recent graduates (nbet no statistics. The scores for course B were: 100 77 87 84 92 Formula for the mean Image result for mean formula Question 24 Compute the mean for Course B. P