It is recommended that adults get 8 hours of sleep each night. A researcher hypothesized college students got less than the recommended number of hours of sleep each night, on average. The researcher randomly sampled 50 college students and calculated a sample mean of 7.9 hours per night. The researcher performed a hypothesis test. What is the null hypothesis? Choose the correct answer below. O A. Ho: Hx <7.9 hours per night O B. Ho: Hx = 7.9 hours per night O C. Ho: Hx <8 hours per night O D. Ho: Hx = 8 hours per night

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