Mathematics, 20.12.2019 02:31 NickWinston8712
As part of a marketing experiment, a department store regularly mailed discount coupons to 25 of its credit card holders. their total credit card purchases over the next three months were compared to the credit card purchases over the next three months for 25 credit card holders who were not sent discount coupons. determine whether the samples are dependent or independent. explain your reasoning
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