# Worksheet: Accuracy, Precision, and Repeatability

In this worksheet, we will practice distinguishing between and describing the accuracy of measurements and their precision and repeatability.

Q1:

The concentration of a solution is known to be 0.101 M. A student determines the concentration to be 0.088 M, 0.087 M, and 0.089 M for each titration performed. Which of the following best describes these results?

• AThe results are accurate but not precise.
• BThe results are precise but not accurate.
• CNot enough information is given to determine accuracy or precision.
• DThe results are neither accurate nor precise.
• EThe results are both accurate and precise.

Q2:

Which of the following data sets is the most precise?

• A16.7 g, 16.8 g, 16.9 g
• B12.1 g, 12.2 g, 12.1 g
• C22.6 g, 22.6 g, 36.8 g
• D13.2 g, 13.2 g, 13.4 g
• E12.4 g, 15.0 g, 13.9 g

Q3:

Consider the results of the archery competition shown in the figure.

Which archer is the most precise?

• AY
• BW
• CX
• DZ

Which archer is the most accurate?

• AW
• BZ
• CY
• DX

Which archer is the least precise?

• AX
• BW
• CZ
• DY

Q4:

Given the illustrations of accuracy and precision shown, which figure represents a result that is accurate but not precise?

• A
• B
• C
• D