CHAPTER TWELVE t Tests A high school teacher was concerned because her teenage students seemed to be very tired all the time, She knew that a national sleep study was done and that the average sleep per night for teenagers, the population value, was 8.3 hours. The teacher conducted a survey among her students and asked them to report the average number of hours they slept per night. She predicted her students slept loss on average than the population. Use the following data from her sample of 10 students to answer the questions 1 through 6. Average Hours Student Slept Per Night 4.5 6.2 8.5 5.0 4.0 - -IOTMOON> 6.7 7.0 6.0 7.5 1.5 1. State the null and research hypotheses. Null hypothesis: Research hypothesis: 2. State whether this is a one-tailed or two-tailed hypothesis. (Circle one) One-talled Two-tailed 3. Calculate the degrees of freedom and find the critical value from Table T. df Critical value = 58 4. Compute the appropriate f test. 5. Compare the computed { value to the critical f value and state the statistical decision. 6. Write a brief interpretation of the results in context of the original research