关键字: 出生人口性别比 极大似然估计函数 控制图
Abstract
After pushing the family planning strictly, the number of population of the our Country is under the control in effect, however the sex ratio at birth is keeping in a high level which will do harm to the Sustainable development of the population. This paper will offer a mathematics model in order to discuss the change of the sex ratio at birth of Hangzhou according to mathematical statistics, and get the maximum likelihood estimation function to be used in demonstration analysis. We try to analyse the incident about sample
with small size by the advanced method, and get the control chart.
Keywords: sex ratio at birth maximum likelihood estimation function control chart
