accuracy vs precision

Accuracy vs Precision

When you hear the word “accurate” what do you think

of?

Accurate and Precise do NOT mean the same thing.

Accuracy means ………

How close a measurement is to some accepted or true value.

Precise means ………

Used to describe how close repeated measurements are to each other

A A

Activity

Could I please have 1 boy volunteer and 1 girl volunteer?

Based on the definition given for accurate and precise. Determine if your classmates

are more accurate or precise or both!

Low Accuracy

High Precision

High Accuracy

High Precision

High Accuracy

Low Precision

Low Accuracy

Low Precision

Elmer Fudd was target practicing. Which diagram below best illustrates inaccuracy and precision?

D

C

B

A

Accuracy with Data

Student “A” and Student “B” used a ruler to measure the sides of the cube below. The volume of the cube is 8cm3? Which student’s data was more accurate?

Volume cm3

Trial 1 7.77 cm3

Trial 2 7.80 cm3

Trial 3 7.92 cm3

Volume cm3

Trial 1 7.99 cm3

Trial 2 8.01 cm3

Trial 3 7.98 cm3

A

B

Accuracy with Equipment

Which graduated cylinder will give you the most accurate liquid measurement?

A B