I can't figure out what you are trying to display in cells B9, B10, B11 and B12, but take a look at this code and see whether you can adapt it to your needs.
Sub august4macroattempt_RPJ()
Range("A3").Value = "Max"
Range("A4").Value = "Min"
Range("A5").Value = "Average"
Range("A6").Value = "Stdev"
Range("A8").Value = "Stdev+Ave"
Range("A9").Value = "Max"
Range("A10").Value = "Ave"
Range("A11").Value = "Min"
Range("A12").Value = "Stdev-Ave"
Dim db As Range
Set db = Range(Range("B14"), Range("B" & Rows.Count).End(xlUp))
Range("B3").Value = WorksheetFunction.Max(db)
Range("B4").Value = WorksheetFunction.Min(db)
Range("B5").Value = WorksheetFunction.Average(db)
Range("B6").Value = WorksheetFunction.StDev(db)
Range("B8").Value = WorksheetFunction.StDev(db) + Range("b5").Value
End Sub