开发者:上海品职教育科技有限公司 隐私政策详情

应用版本:4.2.11(IOS)|3.2.5(安卓)APP下载

phoebeqp · 2024年02月25日

2024考纲还考DW吗

NO.PZ2018101001000054

问题如下:

Allen wants to predict the sales volume of his shop in December 20X8, so he uses sales volume of January 20X7 to November 20X8 as samples to make a linear trend model and gets the following result: Y ^ t =264.75+2.58t. And it also shows that the Durbin-Watson statistic of this model is 1.0384.

Given the critical values at the 0.05 significance level for the Durbin-Watson test are Dl=1.26 and Du=1.44. Which of the followings is most likely correct?

选项:

A.

There exists a negative serial correlation in the errors.

B.

There exists a positive serial correlation in the errors.

C.

There exists no serial correlation in the errors.

解释:

B is correct.

考点: Linear trend model & log-linear trend model.

解析: 本题考的是对该线性趋势模型所做的DW检验 。 这道题已经给出了DW统计量和两个临界值点 , 已知DW统计量=1.0384是小于Dl=1.26的 , 就可以得出这个序列相关是正序列相关的结论 。 所以B选项正确 。

|DW statistic|>|critical value|则拒绝原假设(有serial correlation)

这部分2024年考纲还要求吗?

1 个答案
已采纳答案

品职助教_七七 · 2024年02月25日

嗨,爱思考的PZer你好:


24年的教材对于DW test的全部介绍就只有讲义上的这部分。所以DW test如何做和如何判断结果都不在考察范围内。

这道题仅做了解即可。按照老师基础班上讲的延伸内容是可以做的。

----------------------------------------------
加油吧,让我们一起遇见更好的自己!

  • 1

    回答
  • 1

    关注
  • 248

    浏览
相关问题

NO.PZ2018101001000054 问题如下 Allen wants to prethe sales volume of his shop in cember 20X8, so he uses sales volume of January 20X7 to November 20X8 samples to make a linetrenmol angets the following result: Y ^ t =264.75+2.58t. Anit also shows ththe rbin-Watson statistic of this mol is 1.0384.Given the criticvalues the 0.05 significanlevel for the rbin-Watson test are =1.26 an=1.44. Whiof the followings is most likely correct? A.There exists a negative sericorrelation in the errors. B.There exists a positive sericorrelation in the errors. C.There exists no sericorrelation in the errors. B is correct.考点: Linetrenmol log-linetrenmol.解析: 本题考的是对该线性趋势模型所做的检验 。 这道题已经给出了统计量和两个临界值点 , 已知统计量=1.0384是小于=1.26的 , 就可以得出这个序列相关是正序列相关的结论 。 所以B正确 。 请问A是干扰项吗?序列相关是没有正负之分对吧?

2024-02-04 16:50 1 · 回答

NO.PZ2018101001000054 问题如下 Allen wants to prethe sales volume of his shop in cember 20X8, so he uses sales volume of January 20X7 to November 20X8 samples to make a linetrenmol angets the following result: Y ^ t =264.75+2.58t. Anit also shows ththe rbin-Watson statistic of this mol is 1.0384.Given the criticvalues the 0.05 significanlevel for the rbin-Watson test are =1.26 an=1.44. Whiof the followings is most likely correct? A.There exists a negative sericorrelation in the errors. B.There exists a positive sericorrelation in the errors. C.There exists no sericorrelation in the errors. B is correct.考点: Linetrenmol log-linetrenmol.解析: 本题考的是对该线性趋势模型所做的检验 。 这道题已经给出了统计量和两个临界值点 , 已知统计量=1.0384是小于=1.26的 , 就可以得出这个序列相关是正序列相关的结论 。 所以B正确 。 Test里面的, 都是啥,在讲义的哪里?谢谢

2023-05-14 23:22 1 · 回答

NO.PZ2018101001000054问题如下 Allen wants to prethe sales volume of his shop in cember 20X8, so he uses sales volume of January 20X7 to November 20X8 samples to make a linetrenmol angets the following result: Y ^ t =264.75+2.58t. Anit also shows ththe rbin-Watson statistic of this mol is 1.0384.Given the criticvalues the 0.05 significanlevel for the rbin-Watson test are =1.26 an=1.44. Whiof the followings is most likely correct? A.There exists a negative sericorrelation in the errors.B.There exists a positive sericorrelation in the errors.C.There exists no sericorrelation in the errors.B is correct.考点: Linetrenmol log-linetrenmol.解析: 本题考的是对该线性趋势模型所做的检验 。 这道题已经给出了统计量和两个临界值点 , 已知统计量=1.0384是小于=1.26的 , 就可以得出这个序列相关是正序列相关的结论 。 所以B正确 。检验现在考纲还要求掌握计算和作判断吗

2023-04-28 13:06 1 · 回答

NO.PZ2018101001000054 所以如果值<,就说明是正相关,是吗? 值是干嘛的呢?

2022-01-29 17:40 1 · 回答