A statistics class at a large high school suspects that students at their school are getting less than 888 hours of sleep on average. To test their theory, they randomly sample 424242 of these students and ask them how many hours of sleep they get per night. The mean from the sample is \bar x=7.5 x ˉ =7.5x, with, \bar, on top, equals, 7, point, 5 hours. Here's their alternative hypothesis: H_\text{a}:H a :H, start subscript, start text, a, end text, end subscript, colon The average amount of sleep students at their school get per night is... What is an appropriate ending to their alternative hypothesis?