Chapter 6: Normal Probability Distributions

Let the true population mean sales with the campaign be represented by (X, and the population mean sales without the campaign be represented by (Y. H0: HA: We have a small-sample test, so we’ll get our critical value from the t-table. We have one tail, alpha = 0.05, and 12 degrees of freedom, so the critical t-value will be 1.782. ................
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