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Type I error

In statistical hypothesis testing, a Type I error consists of rejecting a valid null hypothesis as invalid. The symbol for the probability of a Type I error is <math>\alpha</math> (alpha).

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... under the age of 18, 5.7% from 18 to 24, 31.9% from 25 to 44, 23.3% from 45 to 64, and 13.9% who are 65 years of age or older. The median age is 38 years. For every 100 ...