Probability Chart of Results of Test Mailings
When you undertake a marketing activity that produces a result it would be great to know that if you repeated it, the same result will occur or if you did twice the amount, you would get twice the return and so on. Of course, there is no certainty.
Nevertheless, the larger the sample size of the first test, the more confidently you can predict the results of additional marketing activities based on the probability of the result.
The following table on the next page shows how to be 95% sure that additional mailings will produce a result within certain boundaries.
| Test Mailing Size | Return on Test Mailing | 95% Confidence Interval | Test Mailing Size | Return on Test Mailing | 95% Confidence Interval | |
| 100 | 1% | 0% & 2.99% | 2,000 | 1% | 0.55% & 1.45% | |
| 250 | 1% | 0% & 2.26% | 5,000 | 1% | 0.72% & 1.28% | |
| 100 | 2% | 0% & 4.80% | 2,000 | 2% | 1.37% & 2.63% | |
| 250 | 2% | 0.23% & 3.77% | 5,000 | 2% | 1.60% & 2.40% | |
| 100 | 3% | 0% & 6.41% | 2,000 | 3% | 2.24% & 3.76% | |
| 250 | 3% | 0.84% & 5.16% | 5,000 | 3% | 2.52% & 3.48% | |
| 100 | 4% | 0.08% & 7.92% | 2,000 | 4% | 3.12% & 4.88% | |
| 250 | 4% | 1.52% & 6.48% | 5,000 | 4% | 3.45% & 4.55% | |
| 100 | 5% | 0.64% & 9.36% | 2,000 | 5% | 4.03% & 5.97% | |
| 250 | 5% | 2.24% & 7.76% | 5,000 | 5% | 4.38% & 5.62% | |
| 100 | 10% | 4.00% & 16.00% | 2,000 | 10% | 8.66% & 11.34% | |
| 250 | 10% | 6.20% & 13.80% | 5,000 | 10% | 9.15% & 10.85% | |
| 100 | 20% | 12.00% & 28.00% | 2,000 | 20% | 18.21% & 21.70% | |
| 250 | 20% | 14.94% & 25.00% | 5,000 | 20% | 18.87% & 21.13% | |
| 500 | 1% | 0.11% & 1.89% | 10,000 | 1% | 0.80% & 1.20% | |
| 1,000 | 1% | 0.37% & 1.63% | 100,000 | 1% | 0.94% & 1.06% | |
| 500 | 2% | 0.75% & 3.25% | 10,000 | 2% | 1.72% & 2.28% | |
| 1,000 | 2% | 1.12% & 2.88% | 100,000 | 2% | 1.91% & 2.09% | |
| 500 | 3% | 1.48% & 4.52% | 10,000 | 3% | 2.66% & 3.34% | |
| 1,000 | 3% | 1.92% & 4.08% | 100,000 | 3% | 2.89% & 3.11% | |
| 500 | 4% | 2.25% & 5.75% | 10,000 | 4% | 3.61% & 4.39% | |
| 1,000 | 4% | 2.76% & 5.24% | 100,000 | 4% | 3.88% & 4.12% | |
| 500 | 5% | 3.05% & 6.95% | 10,000 | 5% | 4.56% & 5.44% | |
| 1,000 | 5% | 3.62% & 6.38% | 100,000 | 5% | 4.86% & 5.14% | |
| 500 | 10% | 7.32% & 12.68% | 10,000 | 10% | 9.40% & 10.60% | |
| 1,000 | 10% | 8.10% & 11.90% | 100,000 | 10% | 9.81% & 10.19% | |
| 500 | 20% | 16.42% & 23.58% | 10,000 | 20% | 19.20% & 20.80% | |
| 1,000 | 20% | 17.48% & 22.52% | 100,000 | 20% | 19.75% & 20.25% |
How We Can Help You
At ACCOTAX – Hayes Accountants & Hayes landlord Accountants, We can assist you in setting up measurement systems to statistically predict the probability of future marketing activities.
