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84<br />

<br />

(mean + Sd) = 16,6 + 4,67<br />

= 21,27<br />

(mean - Sd) = 16,6 – 4,67<br />

= 11,93<br />

(mean ± Sd) = 11,93 ≤ xi ≤ 21,27<br />

2) Loan to Deposit Ratio (LDR)<br />

Sd =<br />

=<br />

=<br />

( − X )<br />

∑ xi n<br />

( 79,<br />

27<br />

−1<br />

2<br />

− 76,<br />

38)<br />

8 , 35 + 73,<br />

10 + 130,<br />

64<br />

2<br />

2<br />

+ ( 84,<br />

93 − 76,<br />

38)<br />

3 −1<br />

212,<br />

09<br />

=<br />

2<br />

= 10,29<br />

Standar historis:<br />

(mean + Sd) = 76,38 + 10,29<br />

= 86,67<br />

(mean - Sd) = 76,38 – 10,29<br />

= 66,09<br />

(mean ± Sd) = 66,09 ≤ xi ≤ 86,67<br />

b. Rentabilitas<br />

1) Return on Assets (ROA)<br />

∑ xi<br />

X =<br />

n<br />

X = -0,41 + 1,98 + 4,46<br />

3<br />

= 2,01<br />

Sd =<br />

=<br />

=<br />

∑<br />

xi<br />

X =<br />

n<br />

X = 79,27 + 84,93 + 64,95<br />

3<br />

= 76,38<br />

( − X )<br />

∑ xi n<br />

−1<br />

( −0,<br />

41−<br />

2<br />

2,<br />

01)<br />

5 , 86 + 0,<br />

0009 + 6<br />

2<br />

2<br />

+ ( 1,<br />

98 − 2,<br />

01)<br />

3 −1<br />

( 64,<br />

95 − 76,<br />

38)<br />

11,<br />

86<br />

=<br />

2<br />

= 2,43<br />

Standar historis:<br />

(mean + Sd) = 2,01 + 2,43<br />

= 4,44<br />

(mean - Sd) = 2,01 – 2,43<br />

= -0,42<br />

(mean ± Sd) FORUM = -0,42 MANAJEMEN, ≤ xi ≤ 4,44 Volume 10, Nomor 2, Tahun 2012<br />

2) Return on Equity (ROE)<br />

∑ xi<br />

X =<br />

n<br />

2<br />

+<br />

2<br />

+<br />

( 4,<br />

46<br />

−<br />

2,<br />

01)<br />

2<br />

2<br />

13

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