NO.PZ201512020300000302
问题如下:
2. The 95 percent confidence interval for the regression coefficient for the pre-offer price adjustment is closest to:
选项:
A.0.156 to 0.714.
B.0.395 to 0.475.
C.0.402 to 0.468.
解释:
B is correct.
The 95% confidence interval is 0.435 ± (0.0202 × 1.96) = (0.395, 0.475).
小助手,您好。
这道题给出了significance level=5%,那么接下来就得判断,这个假设是单尾还是双尾,才能知道critical value取值。
. 单尾的话,significance level=5%,那么查表critical value=1.65
. 双尾的话,significance level=5%,那么查表critical value=1.96
这道题最后用的是1.96这个值,那么问题来了,这题里哪里看出来是双尾的呢?