How do you distribute multiple surveys to a limited number of participants and get the right sample size?

1. How can you determine the right size or number of respondents?
2. How do you find the sample size of a small population?
3. How do you find the sample size of a large population?

How can you determine the right size or number of respondents?

All you have to do is take the number of respondents you need, divide by your expected response rate, and multiple by 100. For example, if you need 500 customers to respond to your survey and you know the response rate is 30%, you should invite about 1,666 people to your study (500/30*100 = 1,666).

How do you find the sample size of a small population?

To determine the sample size for small populations, we use the normal approximation to the hypergeometric distribution. The sample size formulas for large (binomial) and small (hypergeometric) populations are shown below. p and q are the population proportions. (If you don't know what these, are set them each to 0.5.

How do you find the sample size of a large population?

A good maximum sample size is usually around 10% of the population, as long as this does not exceed 1000. For example, in a population of 5000, 10% would be 500. In a population of 200,000, 10% would be 20,000. This exceeds 1000, so in this case the maximum would be 1000.