The response rate from your new package has just beaten your control.
The following calculation compares response rates and quantities mailed for both your control and test packages. Using standard significance calculations at either a 90% or 95% level of confidence, the results of your test mailing are evaluated against the control performance. If the results are found to be significant, then there is a high level of confidence that the test package would continually beat the control in repeated mailings.
Fill in the blanks and press "Calculate" button below.
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