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Name: A psychology graduate student wants to test the claim that there is a
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Description: A psychology graduate student wants to test the claim that there is a significant difference between the IQs of spouses. To test this claim, she measures the IQs of 9 married couples using a standard IQ test. The results of the IQ tests are listed in

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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A psychology graduate student wants to test the claim that there is a significant difference between the IQs of spouses. To test this claim, she measures the IQs of 9 married couples using a standard IQ test. The results of the IQ tests are listed in the following table. Using a 0.10 level of significance, test the claim that there is a significant difference between the IQs assuming that the population distribution of the paired differences is approximately normal. Let the spouse 1 group be Population 1 and let the spouse 2 group be Population 2.

IQs of Married Couples

Spouse 1	105	115	112	125	105	123	124	98	129
Spouse 2	103	113	108	123	105	125	121	95	130

Step 2 of 3 :

Compute the value of the test statistic. Round your answer to three decimal places. Is it positive or negative?

3 of 3: Draw a conclusion and interpret the decision. Fail to reject or reject? Is there enough evidence?

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