7.b)3) Survey for Previous VarianceR'�9 nn„I
SSS
N
N O C r Do
-O N O c0 O cc)
[ tF IL C L
C O C O L L
m
o C��N ON>,L
L[ iO 4 .0 6 01 OO
LLQ. oU N3N )3 'n
01 0 6 S e
>R O N C 6 A .� In - b LLI y 13
L U 3 L W L M L (Y1 C .0.+
U 0 zvu�[
i!
3c
Ng
LLI'
a
G
n
<
- DJ Lp
\
�
1
\
6
scfr� �gZ
\\\\�
O♦�o¢
� \
CL
R'�9 nn„I
SSS
N
N O C r Do
-O N O c0 O cc)
[ tF IL C L
C O C O L L
m
o C��N ON>,L
L[ iO 4 .0 6 01 OO
LLQ. oU N3N )3 'n
01 0 6 S e
>R O N C 6 A .� In - b LLI y 13
L U 3 L W L M L (Y1 C .0.+
U 0 zvu�[
i!
3c
Ng
LLI'
a