求问计量经济学和统计学问题
求问计量经济学和统计学问题
楼主在做作业的时候遇到一个很奇怪的题目.
请说出以下科目的作用,还给了一个例子：“ordinary least squares - useful in the development of linear economic models”.一共4个小问,【要求用和例子相同的方法表述】.
1.Hypothesis Testing (confidence and prediction intervals) -
2.Maximum Likelihood Estimation -
3.Multicollinearity,Heteroscedasticity and Autocorrelation -
4.Time Series Regression -
1. Hypothesis Testing (confidence and prediction intervals) -useful in judgement of whether the variables are significant；
2. Maximum Likelihood Estimation -another kind of estimation method that can be used in almost all sorts of econometrics models；
3. Multicollinearity, Heteroscedasticity and Autocorrelation -three common phenomena that violate the classical linear hypothesis；
4. Time Series Regression -useful in regressions which use time series data
这种题目大答案并不固定,只是检验一下初学者对这些名词的掌握程度而已.