Dr. Gonzalez hypothesizes that students who sleep 4 hours a night will be lower in happiness than students who sleep 8 hours a night. They randomly assign 50 students to sleep 4 hours and 50 students to sleep 8 hours. The next day, Dr. Gonzalez gives all participants a happiness survey. Results showed that students who slept 4 hours were less happy compared to students who slept 8 hours. Which of the following statements below is true? Dr. Gonzalez failed to reject the null hypothesis. Dr. Gonzalez's research hypothesis is proven true. O There is support for Dr. Gonzalez's research hypothesis. Results prove that sleep causes happiness.

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