Integrating Equations 8–7
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
Interpreting Accuracy
After calculating the integral, the calculator places the estimated uncertainty
of that integral's result in the Y–register. Press
Z
to view the value of the
uncertainty.
For example, if the integral Si(2) is 1.6054 ± 0.0001, then 0.0001 is its
uncertainty.
Example:
Specifying Accuracy.
With the display format set to SCI 2, calculate the integral in the expression
for Si(2) (from the previous example).
Keys: Display: Description:
z
{SC} 2
)
Sets scientific notation with two
decimal places, specifying that
the function is accurate to two
decimal places.
9
9
)
Rolls down the limits of
integration frown the Z–and
T–registers into the X–and
Y–registers.
{
G
1%2ª%
Displays the current Equation.
{
)
X
!!
∫
/)
The integral approximated to two
decimal places.
Z
).
The uncertainty of the
approximation of the integral.
The integral is 1.61±0.00100. Since the uncertainty would not affect the
approximation until its third decimal place, you can consider all the displayed
digits in this approximation to be accurate.
If the uncertainty of an approximation is larger than what you choose to
tolerate, you can increase the number of digits in the display format and
repeat the integration (provided that f(x) is still calculated accurately to the
number of digits shown in the display), In general, the uncertainty of an
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