v
Module
Four
-
MAT-240-
X
ZY
Section4.2
-
MAT240:~2
X
B
Finding
azJPG
X
|
@D
(44)
Music
that
make
)
X
G
what
are
unlocks
on
cour
X
|
+
«
>
C
mMm
25
learn.zybooks.com/zybook/MAT-240-Q7678-OL-TRAD-UG.23EW2/chapter/4/section/2
w
D
£l
Olivia
Budget
exclx...
"f
I
Miss
My
Cafe
%
iCloud
O
Best
Canva
Aestheti...
@
Amazon.com.
Spen...
Homepage
-
South...
@
SNHU
Webmail
4
Bungalow
Rose
Mir...
zyBooks
My
library
>
MAT
240:
Applied
Statistics
home
>
4.2:
Normal
distribution
PARTICIPATION
Y
4.2.3:
Finding
a
z-score
given
a
probability.
»
-
o
X
=
o
@
:
3
All
Bookmarks
|8
zyBooks
catalog
@
Help/FAQ
@
Olivia
Foos
The
GRE
(Graduate
Record
Exam)
scores
for
both
verbal
and
quantitative
reasoning
are
approximately
normally
distributed
and
scaled
to
have
mean
150
with
standard
deviation
of
8.75.
1)
Below
what
score
do
40%
of
all
scores
fall?
Type
as:
#.###
147.783
Yz
2)
Above
what
score
do
20%
of
all
scores
fall?
Type
as:
#.###
157.364
%
Correct
147.783
The
command
NORM.INV(0.4,
150,
8.75)
yields
147.783
as
the
score
below
which
40%
of
all
scores
fall.
In
other
words,
147.783
is
the
40th
percentile.
Correct
157.364
Since
the
NORM.INV
function
is
based
on
the
probability
at
or
below
the
returned
z-score,
the
probability
1
—
0.2
=
0.8
should
be
used
in
the
function.
The
command
NORM.INV(0.80,
150,
8.75)
yields
157.364
as
the
score
above
which
20%
of
all
scores
fall.
Feedback?
B
s
cEEDe
--=-
[«}}
ta
558
PM
a7
12/14/2023
&
-
v
