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Are any physiological indicators associated with schizophrenia? Early studies, based largely on post- mortem analysis, suggest that the sizes of certain areas of the brain may be different in persons afflicted with schizophrenia than in others. Confounding variables in these studies, however, clouded the issue considerably. In a 1990 article, researchers reported the results of a study that controlled for genetic and socioeconomic differences by examining 15 pairs of identical twins, where one of the twins was schizophrenic and the other was not. The twins were located through an intensive search through- out Canada and the United States (Data from R. L. Suddath et al., "Anatomical Abnormalities in the Brains of Monozygotic Twins Discordant for Schizophrenia," New England Journal of Medicine 322(12) (1990):789-93.). The researchers used magnetic resonance imaging (MRI) to measure the volumes (in cm³) of several re- gions and subregions inside the twins' brains. The table presents data based on the reported summary statistics from one subregion, the left hippocampus. Unaffected Affected diff 1.27 0.67 1.63 -0.19 1.47 0.09 1.39 0.19 1.93 0.13 1.26 0.40 1.71 0.04 1.67 0.10 1.28 0.50 1.85 0.07 1.02 0.23 1.34 0.59 2.02 0.02 1.59 0.03 1.97 0.11 1.94 1.44 1.56 1.58 2.06 1.66 1.75 1.77 1.78 1.92 1.25 1.93 2.04 1.62 2.08 Mean 1.7587 1.5600 0.1987 SD 0.2424 0.3013 0.2383

Are any physiological indicators associated with schizophrenia? Early studies, based largely on post- mortem analysis, suggest that the sizes of certain areas of the brain may be different in persons afflicted with schizophrenia than in others. Confounding variables in these studies, however, clouded the issue considerably. In a 1990 article, researchers reported the results of a study that controlled for genetic and socioeconomic differences by examining 15 pairs of identical twins, where one of the twins was schizophrenic and the other was not. The twins were located through an intensive search through- out Canada and the United States (Data from R. L. Suddath et al., "Anatomical Abnormalities in the Brains of Monozygotic Twins Discordant for Schizophrenia," New England Journal of Medicine 322(12) (1990):789-93.). The researchers used magnetic resonance imaging (MRI) to measure the volumes (in cm³) of several re- gions and subregions inside the twins' brains. The table presents data based on the reported summary statistics from one subregion, the left hippocampus. Unaffected Affected diff 1.27 0.67 1.63 -0.19 1.47 0.09 1.39 0.19 1.93 0.13 1.26 0.40 1.71 0.04 1.67 0.10 1.28 0.50 1.85 0.07 1.02 0.23 1.34 0.59 2.02 0.02 1.59 0.03 1.97 0.11 1.94 1.44 1.56 1.58 2.06 1.66 1.75 1.77 1.78 1.92 1.25 1.93 2.04 1.62 2.08 Mean 1.7587 1.5600 0.1987 SD 0.2424 0.3013 0.2383

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Construct a 95% confidence interval for the mean difference in volumes of the left hippocampus between
the unaffected and the affected individuals.

Are any physiological indicators associated with schizophrenia? Early studies, based largely on post- mortem analysis, suggest that the sizes of certain areas of the brain may be different in persons afflicted with schizophrenia than in others. Confounding variables in these studies, however, clouded the issue considerably. In a 1990 article, researchers reported the results of a study that controlled for genetic and socioeconomic differences by examining 15 pairs of identical twins, where one of the twins was schizophrenic and the other was not. The twins were located through an intensive search through- out Canada and the United States (Data from R: L. Suddath et al., "Anatomical Abnormalities in the Brains of Monozygotic Twins Discordant for Schizophrenia," New England Journal of Medicine 322(12) (1990):789-93.). The researchers used magnetic resonance imaging (MRI) to measure the volumes (in cm³) of several re- gions and subregions inside the twins' brains. The table presents data based on the reported summary statistics from one subregion, the left hippocampus. Unaffected Affected diff 1.94 1.27 0.67 1.44 1.63 -0.19 1.56 1.47 0.09 1.58 1.39 0.19 2.06 1.93 0.13 1.66 1.26 0.40 1.75 1.71 0.04 1.77 1.67 0.10 1.78 1.28 0.50 1.92 1.85 0.07 1.25 1.02 0.23 1.93 1.34 0.59 2.04 2.02 0.02 1.62 1.59 0.03 2.08 1.97 0.11 Mean 1.7587 1.5600 0.1987 SD 0.2424 0.3013 0.2383 1
Transcribed Image Text:Are any physiological indicators associated with schizophrenia? Early studies, based largely on post- mortem analysis, suggest that the sizes of certain areas of the brain may be different in persons afflicted with schizophrenia than in others. Confounding variables in these studies, however, clouded the issue considerably. In a 1990 article, researchers reported the results of a study that controlled for genetic and socioeconomic differences by examining 15 pairs of identical twins, where one of the twins was schizophrenic and the other was not. The twins were located through an intensive search through- out Canada and the United States (Data from R: L. Suddath et al., "Anatomical Abnormalities in the Brains of Monozygotic Twins Discordant for Schizophrenia," New England Journal of Medicine 322(12) (1990):789-93.). The researchers used magnetic resonance imaging (MRI) to measure the volumes (in cm³) of several re- gions and subregions inside the twins' brains. The table presents data based on the reported summary statistics from one subregion, the left hippocampus. Unaffected Affected diff 1.94 1.27 0.67 1.44 1.63 -0.19 1.56 1.47 0.09 1.58 1.39 0.19 2.06 1.93 0.13 1.66 1.26 0.40 1.75 1.71 0.04 1.77 1.67 0.10 1.78 1.28 0.50 1.92 1.85 0.07 1.25 1.02 0.23 1.93 1.34 0.59 2.04 2.02 0.02 1.62 1.59 0.03 2.08 1.97 0.11 Mean 1.7587 1.5600 0.1987 SD 0.2424 0.3013 0.2383 1
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