Meaning & use
confidence interval
A range of values, calculated from sample data, likely to contain the true population value.
See it in a sentence
The poll reported a 95 percent confidence interval of plus or minus three points.
Researchers narrowed the confidence interval by collecting data from a much larger sample.
A note on using this word
A wider confidence interval reflects greater uncertainty, while a narrower one suggests a more precise estimate.
Words with a similar meaning
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