skip to navigationskip to main content

Phone: 020 8340 4646 

Email:

Choosing a Service

Choosing an accountant that matches your needs

What Our Clients Say

Read the reviews from some of our satisfied clients

Free Initial Consultation

Understanding your accountancy requirements

Request a Callback

Lets talk at a more convenient time for you

Business Helpsheets

Back to Helpsheets

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 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.

Great reasons and promises we make to you which is why you should call us before deciding on your accountant.

Our Promises

We’re a dedicated team which strives to provide success to our clients in regards to all their accountancy needs.

Meet our team