Film has a much shorter history, especially when        such art forms as music andpainting. [      ]

A. having compared to                

B. comparing to

C. compare to                        

D. compared to

通过数学计算推断出数据组之间的差异来自于自变量的变化，而不是偶然或者随机因素，我们称之为（）

A.方差分析

B.统计显著性

C.推论统计