Two different independent random samples of consumers were asked about satisfaction with their computer system each in a slightly different way. The options available for answer were slightly different in the two cases. When asked how satisfied they were with their computer system, 138 of the first group of 240 sample members opted for "very satisfied." When the second group was asked how dissatisfied they were with their computer system, 128 of 240 sample members opted for very satisfied. Test, at the 5% significance level against the obvious one-sided alternative, the null hypothesis that the two population proportions are equal.
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