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Precision and accuracy
1. Precision and accuracy
The goal is often to determine how close the sample value is to the corresponding actual population value.
Two concepts that are important in this measuring process are accuracy and precision.
Accuracy has to do with how close the results are to the actual value.
Something is accurate if it is true, according to some definition of truth.
Something is precise if it is very clear and to the point, without much variation.
2. What is the accuracy/precision?
Precision is how well-defined (closely grouped) the results (experiments) are.
For each of the following, answer the following. (Note: Images do not show up on-line, just in-class)
Is it precise?
Is it accurate?
What are the possibilities?
3. Four possibilities
There are four possibilities.
precise and accurate
precise and not accurate
not precise and accurate
not precise and not accurate
4. Precise and/or accurate
5. End of page