According to recent statistics, the average Facebook user has 225 Facebook friends. For a statistics project a student at San Jose State College tests the hypothesis that SJSU students will average more than 225 Facebook friends. She randomly selects 3 classes from the schedule of classes and distributes a survey in these classes. Her sample contains 45 students. Here are the null and alternative hypotheses for her study: H0: = 225, Ha: > 225. What does represent in these hypotheses? mean number of Facebook friends for SJSU students mean number of Facebook friends for the average user mean number of Facebook friends for the SJSU students in her sample