【单选题】 In order to test if Stock A is more volatile than Stock B, prices of both stocks are observed to construct the sample variance of the two stocks. The appropriate test statistics to carry out the test is the:
A．
| A. F - test. |
B．
| B. t - test. |
C．
| C. Z - test. |
网考网参考答案：A
网考网解析：
The F test is used to test the differences of variance Letween two samples. 查看试题解析出处>>
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