Business Helpsheets
Back to HelpsheetsProbability 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 would 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.
| If the size of the test mailing is | And the return on the test mailing is | Then 95 chances out of 100, the return on the identical mailing on the whole list will be between | If the size of the test mailing is | And the return on the test mailing is | Then 95 chances out of 100, the return on the identical mailing on the whole list will be between | |
| 100 | 1% | 0 & 2.99% | 250 | 1% | 0 & 2.26% | 100 | 2% | 0 & 4.80% | 250 | 2% | 0.23% & 3.77% |
| 100 | 3% | 0 & 6.41% | 250 | 3% | 0.84% & 5.16% | 100 | 4% | 0.08% & 7.92% | 250 | 4% | 1.52% & 6.48% |
| 100 | 5% | 0.64% & 9.36% | 250 | 5% | 2.24% & 7.76% | 100 | 10% | 4.00% & 16.00% | 250 | 10% | 6.20% & 13.80% |
| 100 | 20% | 12.00% & 28.00% | 250 | 20% | 14.94% & 25.00% | |
| 500 | 1% | 0.11% & 1.89% | 1,000 | 1% | 0.37% & 1.63% | 500 | 2% | 0.75% & 3.25% | 1,000 | 2% | 1.12% & 2.88% |
| 500 | 3% | 1.48% & 4.52% | 1,000 | 3% | 1.92% & 4.08% | 500 | 4% | 2.25% & 5.75% | 1,000 | 4% | 2.76% & 5.24% |
| 500 | 5% | 3.05% & 6.95% | 1,000 | 5% | 3.62% & 6.38% | 500 | 10% | 7.32% & 12.68% | 1,000 | 10% | 8.10% & 11.90% |
| 500 | 20% | 16.42% & 23.58% | 1,000 | 20% | 17.48% & 22.52% | |
| 2,000 | 1% | 0.55% & 1.45% | 5,000 | 1% | 0.72% & 1.28% | 2,000 | 2% | 1.37% & 2.63% | 5,000 | 2% | 1.60% & 2.40% |
| 2,000 | 3% | 2.24% & 3.76% | 5,000 | 3% | 2.52% & 3.48% | 2,000 | 4% | 3.12% & 4.88% | 5,000 | 4% | 3.45% & 4.55% |
| 2,000 | 5% | 4.03% & 5.97% | 5,000 | 5% | 4.38% & 5.62% | 2,000 | 10% | 8.66% & 11.34% | 5,000 | 10% | 9.15% & 10.85% |
| 2,000 | 20% | 18.21% & 21.70% | 5,000 | 20% | 18.87% & 21.13% | |
| 10,000 | 1% | 0.80% & 1.20% | 100,000 | 1% | 0.94 & 1.06% | 10,000 | 2% | 1.72% & 2.28% | 100,000 | 2% | 1.91% & 2.09% |
| 10,000 | 3% | 2.66% & 3.34% | 100,000 | 3% | 2.89% & 3.11% | 10,000 | 4% | 3.12% & 4.39% | 100,000 | 4% | 3.88% & 4.12% |
| 10,000 | 5% | 4.56% & 5.44% | 100,000 | 5% | 4.86% & 5.14% | 10,000 | 10% | 9.40% & 10.60% | 100,000 | 10% | 9.81% & 10.19% |
| 10,000 | 20% | 19.20% & 20.80% | 100,000 | 20% | 19.75% & 20.25% |
How We Can Help You
We can assist you in setting up measurement systems to statistically predict the probability of future marketing activities.
INDUSTRY NEWS
AND BLOG
While the Government is currently paying 80% of workers’ salaries up to £2500 a month for some 8.4 million workers under its furlough scheme, it has made clear that it cannot continue to provide this unprecedented lev...
Running a business can be tricky at the best of times. With so much to do, organise and look over, sometimes it can feel like you are drowning in paperwork and to-do lists. As a small business, growth and expansion are e...
As the saying goes, “nothing’s as certain as death and taxes”. Whilst all of us in working life are guaranteed to be taxed, there are always changes to tax rates, thresholds and wages that affect businesses and tho...