问题如下：
Based on Exhibit 1, Olabudo should:
选项：
A.conclude that the inflation predictions are unbiased.
reject the null hypothesis that the slope coefficient equals 1.
reject the null hypothesis that the intercept coefficient equals 0.
解释：
A is correct. If the consensus inflation forecast is unbiased, then the intercept, b0, should equal 0, and the slope coefficient, b1, should equal 1. The t-statistic for the intercept coefficient is 0.5351, which is less than the critical t-value of 2.0, so the intercept coefficient is not statistically different than 0. To test whether the slope coefficient equals 1, the t-statistic is calculated as: t=–1.0968
Because the absolute value of the t-statistic of –1.0968 is less than the critical t-value of 2.0, the slope coefficient is not statistically different than 1. Therefore, Olabudo can conclude that the inflation forecasts are unbiased.
老师好 这题我用排除法 做的， 但是就是从选项C 中看不是intercept 应= 0 得吗， 因为假设检验后得结论是不拒绝原假设，原假设是 intercept = 0 . 那现在题目给的intercept 不等于0， 是否说明intercept 是有biased? 那这样看A 不是错的吗？ 谢谢。
