158
6-5
Statistic Functions
EOX
Function:
Argument
Numeric expression
®
Obtains the estimated value
of
x for a value
of
y given
as
the argument in the
paired variable statistics
of
(x , y ) .
Parameter:
Argument:
Numeric expression giving
the
value
of
y.
Explanation:
1) Obtains
the
estimated value
of
x for the value
of
y according
to
the linear
regression expression
y
=a+
bx in
the
paired variable statistics
of
(x, y ).
y-
a
EOX(y)
= - b-
2) The values
of
linear regression
constant
term a and linear regression coeffi-
cient
b are determined
by
the
statistical data.
3) The value
of
EOX(y) will be uncertain when b = 0 . The
input
value y
is
with
the
range
of
ly I < I 0
100
and
the
estimated value
of
x
is
with the range
of
IEOX(y)I < 10
100
when b
~
0.
4)
As
a rule, the argument
is
enclosed in parenthesis
but
the parenthesis can be
omitted
if
the argument
is
a variable or a numeric value.
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