confidence interval


Definition of confidence interval

: a group of continuous or discrete adjacent values that is used to estimate a statistical parameter (such as a mean or variance) and that tends to include the true value of the parameter a predetermined proportion of the time if the process of finding the group of values is repeated a number of times

Examples of confidence interval in a Sentence

Recent Examples on the Web The 95 percent confidence interval, used by researchers to define a range of likely outcomes, ranged from -10.5 percent to 49.3 percent., 31 Aug. 2021 The 95% confidence interval, used by researchers to define a range of likely outcomes, ranged from -10.5% to 49.3%. Matthew Herper, STAT, 31 Aug. 2021 The 95% confidence interval reported by J&J means there is a 95% likelihood the actual value is between 39% and 85%. Miriam Fauzia, USA TODAY, 6 June 2021 But its confidence interval is plus or minus 16 hours — leaving open a huge window of the planet where the object might land. NBC News, 7 May 2021 Trump, who analysts and pundits would constantly note had a steady approval rating, had a 95% confidence interval around his approval rating that was three times as large as Biden's has been. Harry Enten, CNN, 25 Apr. 2021 The poll was collected in late March via live calls, text messages, and emails among 500 likely primary Alaska voters and has a margin of error of 4.37 percentage points at a 95% confidence interval. Kerry Picket, Washington Examiner, 6 Apr. 2021 The confidence interval would have to reach down no lower than 30 percent. New York Times, 3 Mar. 2021 That translates to 100 percent efficacy, with a confidence interval of 74.3 percent to 100 percent. New York Times, 3 Mar. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'confidence interval.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of confidence interval

1934, in the meaning defined above

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Time Traveler for confidence interval

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The first known use of confidence interval was in 1934

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Cite this Entry

“Confidence interval.” Dictionary, Merriam-Webster, Accessed 6 Dec. 2021.

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