listed below are the numbers of words spoken in a day by each member of eight different randomly selected couples.  male : 15,929   27,076   1,427   7,934   18,681   15,557   13,813   25,628 female: 24,318   13,488   18,878   17,926   13,451   16,866   15,950   18,972 Use a 0.01 significance level to test the claim that among couples, males speak fewer words in a day than females. Construct the confidence interval that could be used for the hypothesis test described above.  the confidence interval is _________ word(s) < mean difference < __________ word(s)

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