According to Facebook's self-reported statistics, the average Facebook user has 130 Facebook friends. For a statistics project a student at Contra Costa College tests the hypothesis that CCC students will average more than 130 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: Ho: p = 130, Ha: p > 130. What does u represent in these hypotheses? mean number of Facebook friends for the average user O mean number of Facebook friends for the CCC students in her sample O mean number of Facebook friends for CCC students