NO.PZ202106160300004307
问题如下:
which of the following should Liu conclude from the results shown in Exhibit 2?
选项:
A.The average short interest ratio is 5.4975 B.The estimated slope coefficient is different from zero at the 0.05 level of significance C.The debt ratio explains 30.54% of the variation in the short interest ratio解释:
B is correct. The t-statistic is -2.2219, which is outside the bounds created by the critical t-values of +2.011 for a two-tailed test with a 5% significance level.
The value of 2.011 is the critical t-value for the 5% level of significance (2.5% in one tail) for 48 degrees of freedom. A is incorrect because the mean of the short interest ratio is 192.3/50 = 3.846.
C is incorrect because the debt ratio explains 9.33% of the variation of the short interest ratio.
The average short interest ratio是如何计算的?答案给出的计算中192.3是从何而来?