说明：  这是一本英文原版书，介绍利用EXCEL表格进行假设验证方面的功能，对于数据分析和决策很有帮助。
(When you know the desired result of a single formula that you want to achieve, but you do not know the input value that the formula needs to determine the desired result, you can use the Excel Goal Seek feature. Excel goal seeks by varying the value in a single worksheet cell until the formula that depends on that cell displays the desired result.)