When You're Accurate But Not Precise
Imagine you're throwing balls at a bucket. Most of them go in the bucket, but they land all over inside it, some near the top, some near the bottom. That means you're accurate, because most of your throws hit the target (the bucket), but you're not precise, because your throws aren't close to each other.
When You're Precise But Not Accurate
Now imagine all your balls land really close together, like a little pile right next to the bucket. That means you're precise (your throws are close to each other), but you're not accurate, because none of them actually went into the bucket.
You can be both accurate and precise, just like when all your balls go in the bucket and land really close together, that’s a perfect throw!
Examples
- A baker measures flour with a scale that is slightly off, but always gives the same result every time.
- A student throws darts at a dartboard and hits near the center each time, but not exactly on the bullseye.
- A clock is always 5 minutes fast, but it keeps the same time every day.
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See also
- What is accuracy?
- How Does Accuracy and Precision for Data Collection Work?
- What is metrology?
- What is ultraprecise?
- What is precision?