diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
index cba2965..18dcd7a 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
@@ -122,13 +122,13 @@ public class Spreadsheet {
 		else if (formula.startsWith("PRODUKT("))  // e.g. PRODUKT(A3:B9)
 			result = "" + prod(formula.substring(8, colon), endSubstring);
 		else if (formula.startsWith("MITTELWERT("))  // e.g. MITTELWERT(A3:A5)
-			result = "" + mit(formula.substring(12, colon), endSubstring);
+			result = "" + mit(formula.substring(11, colon), endSubstring);
 		else if (formula.startsWith("STABW("))  // e.g. STABW(C6:D8) -> Standardabweichung
-			result = "" + stabw(formula.substring(7, colon), endSubstring);
+			result = "" + stabw(formula.substring(6, colon), endSubstring);
 		else if (formula.startsWith("MIN("))  // e.g. MIN(C13:H13) -> kleinster Wert
-			result = "" + min(formula.substring(5, colon), endSubstring);
+			result = "" + min(formula.substring(4, colon), endSubstring);
 		else if (formula.startsWith("MAX("))  // e.g. MAX(A1:A10) -> größter Wert
-			result = "" + max(formula.substring(5, colon), endSubstring);
+			result = "" + max(formula.substring(4, colon), endSubstring);
 		else if (!formula.isEmpty()) {
 			try {
 				result = "" + calculate(formula);
@@ -199,9 +199,25 @@ public class Spreadsheet {
 	 * @return The arithmetic average calculated.
 	 */
 	private long mit(String startCellName, String endCellName) {
+		long result = 0;
+		int counter = 0;
 
+		for(char col = startCellName.charAt(0); col <= endCellName.charAt(0); col++){
 
-		return 0;
+			for(int row = Integer.parseInt(startCellName.substring(1)); row <= Integer.parseInt(endCellName.substring(1)); row++) {
+				String value = get((row - 1), (col - 'A'));
+
+				if(!value.isEmpty()){
+					result += Long.parseLong(value);
+				}else{
+					continue;
+				}
+
+				counter++;
+			}
+		}
+		result /= counter;
+		return result;
 	}
 
 	/**