Accurate and Precise

NOT accurate, NOT precise

Precise, NOT accurate

Accuracy

The closeness of a measure to the true value.

Precision

How reproducible a measure is; how consistently it can get the same result.

3 x 10²

300

3 x 10³

3000

3 x 10⁴

30000

5.72×10⁹

5,720,000,000

5.72×10⁸

572,000,000

5.72×10⁷

57,200,000

3 x 10¹

30

3 x 10⁰

3

3 x 10⁵

30000

2.4327 x 10⁴

24,327

2.4327 x 10⁵

243,270

2.4327 x 10⁶

2,432,700

7.8 x 10⁻³

0.0078

7.8 x 10⁻²

0.078

7.8 x 10⁻¹

0.78

Observation

Based upon something directly based upon one of the five senses. (i.e. Mr. O'Neill is standing in front of the room facing the class)

Inference

Something we can figure out based upon observations and our reasoning abilities. (i.e. Mr. O'Neill is the teacher)

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