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Question: Although the phenomenon is not well understood, it appears that people born during the winter months are slightly more likely to develop schizophrenia than people born at other times (Bradbury & Miller, 1985). The following hypothetical data represent a sample of 50 individuals diagnosed with schizophrenia and a sample of 100 people with no psychotic diagnosis. Each individual is also classified according to season in which he or she was born. Do the data indicate a significant relationship between schizophrenia and the season of birth? Test at the .05 level of significance.

                                  Season of Birth

                     Summer     Fall     Winter     Spring
No Disorder         26          24        22          28        n = 100
Schizophrenia       9          11        18          12         n = 50
                        35          35        40          40

Reference no: EM13586026

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