Name Date Class
Mathematics and Science Chapter 2 Lesson 2
1. When do scientists rely on estimates?
2. Why are both accuracy and precision important in making a
measurement?
3. What do the significant figures in a measurement include?
4. What is percent error calculation used to determine?
5. ___estimate6. ___accuracy
7. ___precision
8. ___significant figures
9. ___percent error
10. ___mean
11. ___median
12. ___mode
13. ___range
14. ___anomalous data / a. how close a group of measurements are to each
other
b. the number that appears most often in a list of
numbers
c. the digits in a measurement include all digits
measured exactly, plus one estimated digit
d. the numerical average of a set of data
e. how close a measurement is to the true or accepted
value
f. an approximation of a number based on reasonable
assumptions
g. a calculation used to determine how accurate an
experimental value is
h. the middle number in a set of data
i. data that do not fit with the rest of a data set
j. the difference between the greatest value and the
least value in a data set
Name Date Class
Mathematics and Science Chapter 2 Lesson 2
Write the letter of the correct answer on the line at the left.
1. ___A low percent error indicates that the
result you obtained is
a accurate
b inaccurate
C an estimate
d anomalous data
3. ___Which term refers to how close a
group of measurements are to each
other?
a estimate
b percent error
C accuracy
d precision
2. ___Which of the following is the middle
number in a set of data?
a mean
b median
C mode
d range
4. ___If you add up the values in a data
set and then divide the sum by the total
number of values, the result will be the
a mean
b median
C mode
d range
Fill in the blank to complete each statement.
5. Scientists often rely on a(n) ______when they cannot obtain an exact
number.
6. When you ______measurements, the answer should only have the
same number of significant figures as the measurement with the fewest significant
figures.
7. A reliable measurement is ______both and precise.
8. Calculating percent error and checking the reasonableness of data are two of the
math tools scientists use to analyze ______.
9. ______data are data that do not fit with the rest of a data set.
10. The significant figures in a measurement include all digits measured exactly, plus one
______digit.