The size of the sample has no effect on the probability of a type I error (rejecting a true null hypothesis). The probability of a type I error is dependent only on the significance level. Indeed, the probability of a type I error is equal to the significance level.
Chelsea C.
asked 06/19/17Are you more likely to make a Type I error when using a large sample?
Are you more likely to make a Type I error when using a large sample or a small sample?
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Suzy K. answered 06/22/17
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A Type I error is when the null hypothesis is rejected when it is in fact true. Increasing the sample size is a way to reduce errors, so I think you would be more likely to make a Type 1 error with a small sample.
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