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Having obtained reliable test results, you are now preparing a larger roll-out. Granting that no test results are exactly repeated, you still wish to achieve roll-out results that are within a range of values. A minimum roll-out quantity can be calculated to meet that requirement.

Combining test results with your acceptable range of roll-out response rates, and according to a 90% or 95% level of confidence, the calculation below dictates the minimum quantity you should mail.

Fill in the blanks and press "Calculate" button below.

Mailing Size
Projected Response Rate, based on Recent Testing %
Allowable Difference in Response Rate, plus or minus (+/-) %
Level of Confidence in Quantity Prediction is 90%
95%

Calculate Results
Press to update results below:
Minimum/Maximum Response
Quantity Mailed Must Be At Least


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