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NO.PZ202106160300004501

问题如下：

Based on Exhibit 1, Olabudo should:

选项：

A.conclude that the inflation predictions are unbiased B.reject the null hypothesis that the slope coefficient equals one C.reject the null hypothesis that the intercept coefficient equals zero

解释：

A is correct. We fail to reject the null hypothesis of a slope equal to one, and we fail to reject the null hypothesis of an intercept equal to zero. The test of the slope equal to 1.0 is $t=\frac{{0.9830-1.000}}{{0.0155}}=-1.09677$

The test of the intercept equal to 1.0 is $t=\frac{{0.0001-0.0000}}{{0.00002}}=0.5000$

Therefore, we conclude that the forecasts are unbiased.

f the consensus forecasts are unbiased, the intercept should be 0.0 and the slope will be equal to 1.0.为什么不能直接和表中的数据对比却要计算t呢？

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星星_品职助教 · 2023年07月01日

同学你好，表格中的数据都是和0相比的数据。即检验是否为0时可以直接用。本题要检验的是slope是否为1，所以需要重新计算。

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NO.PZ202106160300004501问题如下Baseon Exhibit 1, Olabu shoulA.conclu ththe inflation prections are unbiase.rejethe null hypothesis ththe slope coefficient equals oneC.rejethe null hypothesis ththe intercept coefficient equals zero A is correct. We fail to rejethe null hypothesis of a slope equto one, anwe fail to rejethe null hypothesis of intercept equto zero. The test of the slope equto 1.0 is t=0.9830−1.0000.0155=−1.09677t=\frac{{0.9830-1.000}}{{0.0155}}=-1.09677t=0.01550.9830−1.000=−1.09677 The test of the intercept equto 1.0 is t=0.0001−0.00000.00002=0.5000t=\frac{{0.0001-0.0000}}{{0.00002}}=0.5000t=0.000020.0001−0.0000=0.5000 Therefore, we conclu ththe forecasts are unbiase 为什么这里的stanrerror 可以直接用而不用除以根号n？

2023-05-28 21:28 1 · 回答

NO.PZ202106160300004501题目中已经给出的t数值0.5和 63.4194为什么不能直接用呢，具体代表什么呢？为什么和答案里我们自己算出来的不一样？

2022-01-21 19:36 1 · 回答

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