Question

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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 0.31 0.63 0.43 0.63 s Find the 99% confidence interval -Hz (Round to three decimal places as needed) Does the confidence interval suggest that the population means are different? O A Yes, because the confidence interval does not include zero O B Yes, because the confidence interval includes zero OC. No, because the confidence interval includes zero. OD. No, because the confidence interval does not include zero Can it be said that psychiatric conditions have a biological basis? OA. Yes, because the confidence interval suggests that the means are different OB. No, because the confidence interval does not suggest that the means are different OC. Yes, because the confidence interval does not suggest that the means are different OD. No, because the confidence interval suggests that the means are different

Answer 1

aqy cf for (Mi-M2) =(2, 2) The atzit = (0-31-6-43) (2.921 x ve mey+ (0-622 ) =(-0.9875, 0.7475 ) [o.q88] <Minua <[0.748 difference NO, CI i Toption a - suggest includes zero. ply chrialsic condition - option ③.