confidence interval for vs confidence interval of

Both 'confidence interval for' and 'confidence interval of' are commonly used and correct in English. The choice between them depends on the context and personal preference.

Last updated: March 31, 2024

confidence interval for

This phrase is correct and commonly used in English.

This phrase is used when referring to the range of values that is likely to include a population parameter. For example, 'We calculated a confidence interval for the mean weight of the population.'

Examples:

The confidence interval for the proportion of voters in favor of the new policy is between 45% and 55%.
Can you calculate the confidence interval for the median income of the sample?
Researchers often report a confidence interval for the effect size of a study.

Alternatives:

confidence interval of

confidence interval of

This phrase is correct and commonly used in English.

This phrase is also used when discussing the range of values that is likely to include a population parameter. For example, 'The confidence interval of the population mean is 95%.'

Examples:

What is the confidence interval of the true population proportion?
The study provided a confidence interval of 2 to 5 for the average response time.
The confidence interval of the regression coefficient was quite narrow.

Alternatives:

confidence interval for

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confidence interval for vs confidence interval of