A psychologist wants to know whether wives and husbands who both serve in a foreign war have similar levels of satisfaction in their marriage. To test this, six married couples currently serving in a foreign war were asked how satisfied they are with their spouse on a 7-point scale ranging from 1 (not satisfied at all) to 7 (very satisfied). The following are the responses from husband and wife pairs. Married Couples

Wife Husband
7 5
4 6
6 5
7 6
6 5
6 5
(a) Test whether or not mean ratings differ at a 0.05 level of significance. State the value of the test statistic. (Round your answer to three decimal places.)
Changed: Your submitted answer was incorrect. Your current answer has not been submitted.
State the decision to retain or reject the null hypothesis.
Retain the null hypothesis.
Reject the null hypothesis.
(b) Compute effect size using eta-squared. (Round your answer to two decimal places.)