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

aileen20180623 · 2022年12月05日

这问我选的c

* 问题详情,请 查看题干

NO.PZ202208220100000405

问题如下:

Determine using Exhibit 2 which one of the following statements is most likely to be correct. Monthly seasonality in the firm’s portfolio is________.

选项:

A.highly likely B.highly unlikely C.not able to be determined from the given data

解释:

B is correct. Monthly seasonality in the firm’s portfolio is highly unlikely. Thevariance explained by the model (R-squared) is only 10.3%, and after adjusting forthe number of independent variables (adjusted R-squared), it becomes negative.Also, the insignificant F-statistic indicates a 56.3% chance that all variable coefficients are zero. Finally, t-statistics and associated p-values indicate that all thevariable coefficients are insignificant (i.e., not significantly different from zero).Consequently, monthly seasonality is highly unlikely to exist in this portfolio.

您好,这题我不是很懂,我选的c,我看的是pvalue和t对比,不是很理解答案里面的那些多重解释是联合看出还说其中一个看出来的

2 个答案

星星_品职助教 · 2022年12月09日

@黄路迦

是p-value的意思。

星星_品职助教 · 2022年12月06日

同学你好,

这道题主要看的是F检验,由于Exhibit 2中给出的significance of F(即F检验的“p-value”)为0.563,所以无法拒绝方程所有系数都同时等于0的原假设(除非significance level设到56.3%以上)。由此可以得到结论,从Jan,Feb一直到Nov的11个X变量的系数同时为0.

由于这11个变量都是dummy variable,所以系数代表对应月份的excess return和Dec的excess return之差。系数都为0代表每个月份和12月份的excess return之间都没有显著差别,也就不存在seasonality现象。

-----

对于多元回归,优先看测试所有系数的F检验,对于单独变量的t检验可能会忽略所有系数加在一起对于方程的影响。

-----

提问时需要选择正确的科目标签,本题标签被设为了CPA 会计。

黄路迦 · 2022年12月09日

significance of F是p-value的意思吗?我以为是critical的意思

  • 2

    回答
  • 1

    关注
  • 669

    浏览
相关问题

NO.PZ202208220100000405 问题如下 termine using Exhibit 2 whione of the following statements is most likely to correct. Monthly seasonality in the firm’s portfolio is________. A.highly likely B.highly unlikely C.not able to terminefrom the given t B is correct. Monthly seasonality in the firm’s portfolio is highly unlikely. Thevarianexplainethe mol (R-square is only 10.3%, anafter austing forthe number of inpennt variables (austeR-square, it becomes negative.Also, the insignificant F-statistic incates a 56.3% chanthall variable coefficients are zero. Finally, t-statistianassociatep-values incate thall thevariable coefficients are insignificant (i.e., not significantly fferent from zero).Consequently, monthly seasonality is highly unlikely to exist in this portfolio. 所以只要说significant F 就是 F的p value 就和significanlevel(e.g. 5%)比较就可以了?

2024-07-14 01:51 1 · 回答

NO.PZ202208220100000405问题如下 termine using Exhibit 2 whione of the following statements is most likely to correct. Monthly seasonality in the firm’s portfolio is________. A.highly likelyB.highly unlikelyC.not able to terminefrom the given tB is correct. Monthly seasonality in the firm’s portfolio is highly unlikely. Thevarianexplainethe mol (R-square is only 10.3%, anafter austing forthe number of inpennt variables (austeR-square, it becomes negative.Also, the insignificant F-statistic incates a 56.3% chanthall variable coefficients are zero. Finally, t-statistianassociatep-values incate thall thevariable coefficients are insignificant (i.e., not significantly fferent from zero).Consequently, monthly seasonality is highly unlikely to exist in this portfolio. F value =0.879, significant F 等于0.563,F 值落在临界值右边,不是应该要拒绝原假设吗

2023-10-22 23:31 1 · 回答

NO.PZ202208220100000405问题如下 termine using Exhibit 2 whione of the following statements is most likely to correct. Monthly seasonality in the firm’s portfolio is________. A.highly likelyB.highly unlikelyC.not able to terminefrom the given tB is correct. Monthly seasonality in the firm’s portfolio is highly unlikely. Thevarianexplainethe mol (R-square is only 10.3%, anafter austing forthe number of inpennt variables (austeR-square, it becomes negative.Also, the insignificant F-statistic incates a 56.3% chanthall variable coefficients are zero. Finally, t-statistianassociatep-values incate thall thevariable coefficients are insignificant (i.e., not significantly fferent from zero).Consequently, monthly seasonality is highly unlikely to exist in this portfolio. F检验的criticvalue和test statistic在这道题是多少,怎么我看答案和提问都说0.563就是不显著,没明白其中的逻辑关系

2023-10-05 10:36 1 · 回答

NO.PZ202208220100000405 问题如下 The CIO asks you to analyze one of the firm’s portfolios to intify influentioutliers thmight skewing regression results of its return ivers. For eaobservation, you calculate leverage, the stuntizeresial, anCook’s There are 96 observations antwo inpennt variables (k = 2), anthe criticalt-statistic is 2.63 a 1% significanlevel. Partiresults of your calculations areshown in Exhibit 1.Finally, you are taskewith investigating whether there is any monthly seasonality in the excess portfolio returns. You construa regression mol using mmy variables for the months; your regression statistianANOVA results are shown in Exhibit 2. termine using Exhibit 2 whione of the following statements is most likely to correct. Monthly seasonality in the firm’s portfolio is________. A.highly likely B.highly unlikely C.not able to terminefrom the given t B is correct. Monthly seasonality in the firm’s portfolio is highly unlikely. Thevarianexplainethe mol (R-square is only 10.3%, anafter austing forthe number of inpennt variables (austeR-square, it becomes negative.Also, the insignificant F-statistic incates a 56.3% chanthall variable coefficients are zero. Finally, t-statistianassociatep-values incate thall thevariable coefficients are insignificant (i.e., not significantly fferent from zero).Consequently, monthly seasonality is highly unlikely to exist in this portfolio. 请问这道题的讲解视频链接?

2023-09-24 17:40 3 · 回答

NO.PZ202208220100000405 问题如下 termine using Exhibit 2 whione of the following statements is most likely to correct. Monthly seasonality in the firm’s portfolio is________. A.highly likely B.highly unlikely C.not able to terminefrom the given t B is correct. Monthly seasonality in the firm’s portfolio is highly unlikely. Thevarianexplainethe mol (R-square is only 10.3%, anafter austing forthe number of inpennt variables (austeR-square, it becomes negative.Also, the insignificant F-statistic incates a 56.3% chanthall variable coefficients are zero. Finally, t-statistianassociatep-values incate thall thevariable coefficients are insignificant (i.e., not significantly fferent from zero).Consequently, monthly seasonality is highly unlikely to exist in this portfolio. 如题。

2023-03-21 22:20 1 · 回答