Traumatic Brain Injury (TBI) is a significant health problem. TBI is caused by impacts to the head that might occurduring contact sports, motor vehicle accidents, and similar events. TBI is known to produce cognitive impairments and reductions in brain volume. In a recent, repeated-measures study on TBI, Zagorchev et al.(2016) observed that the size of the amygdala among mild TBI patients was reduced at 12 months after injury, relative to two months after injury. Suppose that a researcher is interested in replicating and extending this observation. She recruits n=8 participants with mild TBI and records the volume of a brain region at 2 months and again and again at 12 months. Her data are listed below a.) Test the hypothesis that volume of the brain region changed between 2 & 12 months. Use α=0.05, two-tailed b.) Compute the 80% confidence interval for the mean change in attention span for the population
Traumatic Brain Injury (TBI) is a significant health problem. TBI is caused by impacts to the head that might occurduring contact sports, motor vehicle accidents, and similar
a.) Test the hypothesis that volume of the brain region changed between 2 & 12 months. Use α=0.05, two-tailed
b.) Compute the 80% confidence interval for the mean change in attention span for the population
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