Statistics for The Behavioral Sciences (MindTap Course List)
Statistics for The Behavioral Sciences (MindTap Course List)
10th Edition
ISBN: 9781305504912
Author: Frederick J Gravetter, Larry B. Wallnau
Publisher: Cengage Learning
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Chapter 17, Problem 21P

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 seasonin which he or she was born. Do the data indicate a

Significant relationship between schizophrenia and the season of birth? Test at the .0 5 level of significance.

Season of Birth

No Disorder Schizophrenia

Summer

Fall

Winter

Spring

    26 24 22 28
    9 11 18 12

35

40

O

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