The sample size of innovation and entrepreneurship questionnaire is the number of units contained in the sample, that is, the number of individuals sampled. Sample size can affect sampling error, time required for investigation, cost required for investigation and some information of investigation team members. So how to determine the sample size, mainly has the following factors.

First, changes in the overall indicators. This will affect the accuracy of the response rate, thus affecting the sample size. In the process of calculating samples, the following important links should also be considered.

Second, the predicted value should have certain accuracy. Because the sampling error will directly affect the accuracy of the estimated value.

Thirdly, in order to ensure the accuracy of sampling rate, sampling inference must be done well to make it credible; After determining the sample, the calculation of sample size is a key issue, which requires a scientific formula and is highly professional. Generally speaking, the sample size depends on the number of estimation domains.

In short, the determination of sample size should follow the principle of one person, that is, the interaction between accuracy and cost, the cost should have the highest accuracy and the accuracy should have the lowest cost.