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13.
Gravetter/Wallnau/Forzano,
Essentials

Chapter
4

Endofchapter
question
13
Calculate
SS,
variance,
and
standard
deviation
for
the
following
population
of
N
=
8
scores:
1,3,1,10,1,0,1,3
SS:
72
v
Variance:
9
\I'
Standard
deviation:
3
\f
Points:
1/1
Explanation:
Close
Explanation
X
The
mean
is
ET
_
o+1+1+14é1+3+3+10
_
?
o5
_
(IX)2
(20)°
_
_
SS—ZXZ—T—1+9+1+100+1+0+1+9—T—122—50—72
The
population
variance
=
02
=
S—l\?
2
The
standard
deviation
=
¢
=
Vo
=
V9
=
3.
The
computational
¥
formula
should
be
used
to
compute
SS
because
mean
=
[2.5
v
.
Points:
1/1
Explanation:
Close
Explanation
The
computational
formula
should
be
easier
to
use
because
mean
=
2.5.
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