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Statistical Calculation Formulas
Type
Linear
Quadratic
Euler exponential
Logarithmic
Power
Inverse
General exponential
An error will occur when:
• The absolute value of the intermediate result or
calculation result is equal to or greater than 1
• The denominator is zero.
• An attempt is made to take the square root of a
negative number.
• No solution exists in the quadratic regression
calculation.
Σ
x ⎯
–
=
x
n
Σ
sx =
Σ
y
–
=
⎯
y
n
Σ
=
⎯
sy
Normal Probability Calculations
In STAT mode, the three probability density functions
can be accessed under the MATH menu, with a random
number used as a normal distribution variable.
E-47
–
− nx
2
2
x
⎯
n −
1
–
− ny
2
2
y
n −
1
Regression formula
=
+ bx
y
a
=
+ bx +
y
a
=
⋅
y
a
e
=
+ b ⋅
y
a
=
⋅
y
a
x
=
+ b
y
a
=
⋅ b
y
a
Σ
2
x
⎯
σx =
Σ x = x
+ x
1
2
Σ x
= x
+ x
2
2
1
Σ
2
y
σy =
⎯
Σ xy = x
+ x
y
1
1
Σ y = y
+ y
1
2
Σ y
= y
+ y
2
2
1
cx
2
x
b
x
ln
b
1
⎯
x
x
–
− nx
2
n
+
+ x
...
n
+
+ x
2
...
2
n
–
− ny
2
n
+
+ x
...
y
2
2
+
+ y
...
n
+
+ y
2
...
2
×
100
10
.
2
y
n
n
2
n
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