People who sustain a concussion or a traumatic brain injury (TBI) are likely to experience sleep problems. Do these problems persist over time? Researchers recruited a sample of 31 patients
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People who sustain a concussion or a traumatic brain injury (TBI) are likely to experience sleep problems. Do these problems persist over time? Researchers recruited a sample of 31 patients who had their first TBI 18 months earlier and a control group of 42 otherwise similar individuals without prior TBIs. They compared sleep duration per 24 hours for the 2 groups.
Write the null and alternate hypothesis for this test.
Ho: μTBI - μnonTBI = 0
Ha: μTBI - μnonTBI > 0
Ho: μd = 0
Ha: μd ≠ 0
where d =TBI - nonTBI
Ho: μd = 0
Ha: μd > 0
where d = TBI - non-TBI
Ho: μd = 0
Ha: μd < 0
where d = TBI - nonTBI
Ho: μTBI - μnonTBI = 0
Ha: μTBI - μnonTBI ≠ 0
Ho: μTBI - μnonTBI = 0
Ha: μTBI - μnonTBI < 0
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