在B17单元格输入以下公式
=AVERAGEIFS(B2:B17,A2:A17,">=2",A2:A17,"<=4")
在B18单元格输入以下公式
=AVERAGEIFS(B2:B17,A2:A17,">=5",A2:A17,"<=7")
在B19单元格输入以下公式
=AVERAGEIFS(B2:B17,A2:A17,">=8",A2:A17,"<=10")
=AVERAGE(IF((A1:A17>=2)*(A1:A17<=4),B1:B17,""))
数组公式,以Ctrl+Shift+Enter结束。