1. Accuracy vs. Reproducibility
Accuracy – how close a measurement is to the true value.
Reproducibility- how close a group of measurements are to each other.
Scientists aim for both accuracy and reproducibility
To ensure accuracy, you need to make sure
you take measurements carefully using
appropriate tools or instruments.
To ensure reproducibility, you need to
repeat the measurements a few times.

2. Accurate vs. Reproducible
Neither accurate nor reproducible
Reproducible but not accurate
Both reproducible and accurate

3. Examples:
3 Students measure Mrs. Easley’s height. They get 62 cm, 61.5 cm, and 62.3 cm. Her actual height is cm. Accurate, reproducible, neither, or both?

4. Example 2
3 Students measure the distance a toy car moves in 5 seconds. The distances they measure are 48 cm, 152 cm, and 2 cm. The actual distance was 80 cm. Accurate, reproducible, neither, or both?

5. Example 3
Students measured the boiling point of water. They measured 100 C, C and 99.5 C. The boiling point of water is 100 C. Accurate, reproducible, neither or both?