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 0.02 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 106 120 117 109 102 128 123 116 123 Spouse 109 124 120 111 105 126 124 120 127 2 Copy Data Step 2 of 3: Compute the value of the test statistic. Round your answer to three decimal places. Answer Tables Keypad