以下是关于收入(income,单位:千元)和教育年限(educ_y)两个变量的描述统计表和相关系数表:
. sum income | educ_y | | | | |
Variable | | | Obs | Mean | Std. Dev. | Min | Max |
--------- |
|
|
|
|
|
|
income | | | 100 | 9.210656 | 4.583941 | .5 | 21.75 |
educ_y | | | 100 | 10.58 | 2.785895 | 0 | 17 |
. correlate income educ_y | | | | |
(obs=100) | | | | | | |
| | | income | educ_y | | | |
------------ |
|
|
|
| | |
income | | | 1.0000 | | | | |
educ_y | | | 0.3201 | 1.0000 | | | |
请根据上面两个表格的信息,利用 Stata 作为计算器的功能进行计算,计算下表(回归模型)的空白项。然后写出回归直线,并对回归模型(模型拟合指标和回归系数)进行解释。
. regress income educ_y | | | | | | |
Source | | SS | df | MS | Number of obs = | 100 |
-------------+ | ------------------------------ | | | F( 1, | 98) | = | |
Model | | | 1 | | Prob > F | | = | |
Residual | | | | | R-squared | | = | |
-------------+ | ------------------------------ | | | Adj R-squared = | 0.0933 |
Total | | | | | Root MSE | | = | 4.3648 |
------------------------------------------------------------------------------
income | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
educ_y | _cons |
------------------------------------------------------------------------------
不是很能看到上面给出了的两个表,是不是要自己生成数据来求啊?