After Cronbach's alpha on the bottom =(4/3), Where did the 3 come from? I know 4 is the number of questions, but not where three came from? Trying to compare to my survey, which has 18 questions and 72 respondents to 5-point Likert scale questions.

A B C D E F 7 Person # Question 1 Question 2 Question 3 Question 4 Total H =SUM($B2:$E2) =SUM($B3:$E3) =SUM($B4:$E4) =SUM($B5:$85) (D CO V O U A W N H UNUNPAN =SUM($B6:$E6) W W A N W W N H N P W N W W W N H N P P W N W G UI N W N N P =SUM($B7:$E7) =SUM($B8:$E8) =SUM($B9:$E9) =SUM($B10:$E10) 11 10 2 =SUM($B11:$E11) 12 =VAR.S(F2:F11) 13 Variance =VAR.S(B2:B11) =VAR.S(C2:C11) =VAR.S(D2:D11) =VAR.S(E2:E11) =SUM(B13:E13) 14 15 Cronbach's Alpha =(4/3)*(1 - F13/F12) 16 17