=AVERAGE(IF(AND(F3:F16>=0,F3:F16<=30),F3:F16))
或
=AVERAGE(IF((F3:F16>=0)*(F3:F16<=30),F3:F16))
按三键CTRL+SHIFT+ENTER结束公式输入
=AVERAGE(IF(AND(F3:F16>=5,F3:F16<=30),F3:F16))
或
=AVERAGE(IF((F3:F16>=5)*(F3:F16<=30),F3:F16))
按三键CTRL+SHIFT+ENTER结束公式输入
公式:
=AVERAGEIF(F:F,"<=30")
=sumif(F3:F16,"<=30")/countif(F3:F16,"<=30")