Data: control (healthy) group: N = 10, mean brain volume = 0.45, standard deviation = 0.08; OCD group: N = 10, mean brain volume = 0.34, standard deviation = 0.08
Are severe psychiatric disorders related to biological factors that can be physically measured? Refer to Luxenberg...
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2) The volume of the right cordate section of the brain was estimated from CT scans for patients with obsessive-compulsive disorder, and a control group of healthy persons. The following data were obtained (volumes in mL). OCD patients 0.34 0.08 10 Control 0.45 0.09 12 Mean 03 a. Conduct a hypothesis tests to compare the variance between the groups. b. Conduct a hypothesis test to examine if there is...
6. A study used CT-scans to collect data on brain volumes for a group of patients with obsessive- compulsive disorders and a control group of healthy persons. The results are below. Assume that the population standard deviations are not the same. Use a 0.05 significance level to test the claim that the mean brain volume for obsessive-compulsive patients is more than the mean brain volume of healthy persons. (15 pts) Obsessive-compulsive patients: n = 35 X = 1390 S =...
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Afflicted Healthy A study was done to see if psychiatric conditions had biological symptoms. The brain volumes of afflicted and healthy patients were measured. Construct a 99% confidence interval for the difference between the population means. Do not assume the population standard deviations are equal What do the results suggest about the difference between the population means? Does it appear that psychiatric conditions have a biological basis? Click the icon to view the table of critical values...