Section 2: Precision & Accuracy Name
Date
Fundamental Topics in Science © 2001 Texas Instruments
Try-It!™ 2-6
Calculate standard deviation
Standard deviation is an excellent indicator of the precision of measurements. Range (the
difference between the maximum and minimum measurements) also shows precision. Use your
TI
1
83 Plus to calculate the standard deviation and range of this set of measurements.
To Do This Press Display
1. Copy the
stdDev(
function from the
LIST MATH
menu to the home screen.
\
a
a
7:stdDev(
2. Enter the list name, complete the
expression, and evaluate.
Tip:
This is an alternate way to enter a
list name.
\
G
E
b
3. Calculate the range (maximum value
minus minimum value).
\
a
a
2:max(
\
G
E
\
a
a
1:min(
\
G
E
b
What value did you calculate for the standard deviation? For the range? Given these calculations,
describe how accurate these measurements were; how precise they were.
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