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in the decadeincome.xlsx file, you are given a sample of income (in thousands of 1980 dollars for a set of families sampled in 1980 and
in the decadeincome.xlsx file, you are given a sample of income (in thousands of 1980 dollars for a set of families sampled in 1980 and 1990. assume that these families are representative of the whole united states, republican claim that the country was better off in 1990 than in 1980 because average income increased. do you agree. plse provide excel file computation
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