NO.PZ2023040502000010
问题如下：
Hansen believes that for each 1 percent increase in
pre-offer price adjustment, the initial return will increase by less than 0.5
percent, holding other variables constant. Hansen wishes to test this
hypothesis at the 0.05 level of significance.
The most appropriate null hypothesis and the most
appropriate conclusion regarding Hansen’s belief about the magnitude of the
initial return relative to that of the pre-offer price adjustment (reflected by
the coefficient bj) are:
选项：
解释：
To test Hansen’s belief about the direction and
magnitude of the initial return, the test should be a one-tailed test. The
alternative hypothesis is H1:
, and the null hypothesis is H0:
.The correct test statistic is: t =
(0.435-0.50)/0.0202 = -3.22, and the critical value of the t-statistic
for a one-tailed test at the 0.05 level is -1.645. The test statistic is
significant, and the null hypothesis can be rejected at the 0.05 level of
significance.
怎么判断左尾右尾，一级没学好，麻烦讲一下
