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Frame 56 Question
The z Score
Basic Statistics
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ANSWER
TO
FRAME
56.
The
area
to
the
left
of
the
mean
is
50%.
The
area
from
u - 2σ to u is
47.5%.
The
difference
is
50%
-
47.5%1
=
2.5%
and
is
the
left
tail
area
below
u - 2σ.
The
diagram
would
appear
as
follows:
86
FI0921
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