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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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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