There is a bond portfolio return of 10% an

问题单项选择题

There is a bond portfolio return of 10% and estimates a standard deviation of annual returns of 4%. Assuming normality assumptions for returns, which of the following statement is FALSE（）

A. The 90 percent confidence interval will be from 3.10 percent to 17.8 percent.

B. The 95 percent confidence interval will be from 2.16 percent to 17.84 percent.

C. The 99 percent confidence interval will be from -0.32 percent to 20. 32 percent.

答案

参考答案：A

解析：

The 90 percent confidence interval is 10%±1.645(4%) or from 3.42% to 16.58%.