Explanation Calculation: It is given that two samples (schizophrenics and normal subjects) with sample sizes of 41 and 49 were taken. x ¯ 1 =104 .23, x ¯ 2 = 62.24 , s 1 = 45.45 , s 2 = 16.34 , and α = 0.01 . The hypotheses are given below: Null hypothesis: H 0 : σ 1 2 = σ 2 2 . That is, there is no significance difference between the variances of schizophrenics and normal subjects. Alternative hypothesis: H a : σ 1 2 > σ 2 2 That is, the variance of schizophrenics is significantly higher than the variance of normal subjects. Comparison of two variances: The hypothesis test to compare two population variances can be obtained as follows: Software Procedure: Step-by-step procedure to obtain the test using MINITAB software: Choose Stat > Basic Statistics > 2 Variances

13th Edition

ISBN: 9780134080215

Author: James T. McClave, Terry T Sincich

Publisher: PEARSON

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Chapter 9.6, Problem 113ACI

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Test whether the variance of schizophrenics is higher than the variance of normal subjects.

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Chapter 9.6, Problem 112ACB

Chapter 9.6, Problem 114ACI

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Statistics (13th Edition)

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