Confidence intervals provide a range with a lower and upper limit, of where the mean score of the population is likely to be contained.Since researchers only have data from the sample, they estimate this range from the data collected from the sample representing the population. .

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Confidence intervals are statistical tools used to estimate the range within which the true population parameter (such as the mean) is likely to fall, based on sample data.

Confidence Intervals Provide a Range with a Lower and Upper