2. In Fall 2019, the average class size at CSUN was 27.7. You are wondering whether this is the current class size, so took a random sample of 400 current CSUN classes. Their average size is 28.4 with a standard deviation of 15.4. a. Write the number corresponding to each symbol. If a quantity is unknown, write "UNK." Ho n b. Choose the best hypothesis from those below to write on each line. = 27.7 27.7 27.7 If you think that the average class size has increased since Fall 2019: Ho: Ha: If you think that the average class size has decreased since Fall 2019: Ho: Ha: If you think that the average class size is different than in Fall 2019: Ho: Ha: 2. In Fall 2019, the average class size at CSUN was 27.7. You are wondering whether this is the current class size, so took a random sample of 400 current CSUN classes. Their average size is 28.4 with a standard deviation of 15.4. a. Write the number corresponding to each symbol. If a quantity is unknown, write "UNK." Ho n b. Choose the best hypothesis from those below to write on each line. = 27.7 27.7 27.7 If you think that the average class size has increased since Fall 2019: Ho: Ha: If you think that the average class size has decreased since Fall 2019: Ho: Ha: If you think that the average class size is different than in Fall 2019: Ho: Ha: