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他三哥 · 2020年02月17日

这道题的解析相当于什么也没说啊亲

问题如下:

Batten runs a regression analysis using Stellar monthly returns as the dependent variable and the monthly change in CPIENG (US Consumer Price Index for Energy) as the independent variable.

For the analysis run by Batten, which of the following is an incorrect conclusion from the regression output?

选项:

A.

The estimated intercept coefficient from Batten’s regression is statistically significant at the 0.05 level.

B.

In the month after the CPIENG declines, Stellar’s common stock is expected to exhibit a positive return.

C.

Viewed in combination, the slope and intercept coefficients from Batten’s regression are not statistically significant at the 0.05 level.

解释:

C is correct.

C is the correct response, because it is a false statement. The slope and intercept are both statistically significant.

这道题最简单的做法是什么?用系数除以标准差,等于-2.301632,然后一看绝对值比统计量给出的2.3014的绝对值要大,就落在拒绝域?

1 个答案

星星_品职助教 · 2020年02月18日

同学你好,

这道题不用再除了,直接用表格里的t统计量=-2.0314,然后和查表所得的t critical value比较就行。考试的时候critical value的相关信息会给。

(比较的是t统计量和t临界值。你做的除法就是计算t统计量的过程,和表格里的数字是一样的,差别是因为四舍五入导致的)

星星_品职助教 · 2020年02月24日

追问没有提示,才看到..对这是个非典型的题,t=-2.0314直接给了。正常检验统计量是要计算的,然后和查表值作比较。就是你说的那个流程

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相关问题

NO.PZ2015120204000012 In the month after the CPIENG clines, Stellar’s common stois expecteto exhibit a positive return. Viewein combination, the slope anintercept coefficients from Batten’s regression are not statistically significant the 0.05 level. C is correct. C is the correresponse, because it is a false statement. The slope anintercept are both statistically significant.可以证明Y变化量大于零,并不能说明Y大于零啊。您看我理解哪里有问题。谢谢

2021-08-19 05:32 1 · 回答

NO.PZ2015120204000012 B可以一下吗?

2021-02-02 15:14 1 · 回答

品职老师,请问这道题是不是可以这样理解。 首先,1) 确认假设H0=sample b1=0 2) 计算confinlevel: sample b1土t *Sb sample = -0.6486 土 1.96*0.2818 = (-1.2009, -0.096),因为样本很大假设服从Z分布,95%对应1.96. 3)计算t统计量=-2.301632,因为落在拒绝域,所以拒绝原假设,所以可以得出自变量对因变量显著影响。

2020-10-11 15:08 2 · 回答

A为什么是对的呢

2020-06-12 14:46 1 · 回答

In the month after the CPIENG clines, Stellar’s common stois expecteto exhibit a positive return. Viewein combination, the slope anintercept coefficients from Batten’s regression are not statistically significant the 0.05 level. C is correct. C is the correresponse, because it is a false statement. The slope anintercept are both statistically significant. Intercept为啥是significant? T值3.0275挺大的啊

2020-04-13 20:20 2 · 回答