Interpreting Accuracy

After calculating the integral, the calculator places the estimated uncertainty of that integral's result in the Y–register. Press Zto 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:

zž{SC} 2

) 

Sets scientific notation with two

 

 

decimal places, specifying that

 

 

the function is accurate to two

 

 

decimal places.

99

)

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

Integrating Equations 8–7

File name 32sii-Manual-E-0424

 

Printed Date : 2003/4/24

Size : 17.7 x 25.2 cm