Estimate the total population of Heshun county in year 1998 according to the population data of 50 sample villages in the sampling investigation of Heshun county
Implementation steps:
- Calculate the mean of 50 sample villages, and multiply 326, the result is the estimated total population.
- Estimate the population variance by the sample data, estimate the sampling accuracy by the population variance and sample size.
Calculate:
Estimate the average population of each village firstly, then the mean multiply the village size, the result is the total population of Heshun county.
- The estimated total population of Heshun county:
- Sample variance:
- Sampling accuracy :
；
Sample size
n;
Total administrative village size
N
in the research areas