Testing Two Independent Sample Means

An analyst at a department store wants to evaluate a recent credit card promotion. To this end, 500 cardholders were randomly selected. Half received an ad promoting a reduced interest rate on purchases made over the next three months, and half received a standard seasonal ad.

This example uses the file creditpromo.sav. See the topic Sample Files for more information. Use Independent-Samples T Test to compare the spending of the two groups.

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