Increasing the sizes of the samples in a study to estimate the difference between two population means will increase the probability of committing a Type I error.

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Quizplus · Accepted Answer

Increasing the sample sizes in a study will actually decrease the probability of committing a Type I error. This is because as the sample size increases, the standard error decreases, making it easier to detect a statistically significant difference between the two population means.

Increasing the Sizes of the Samples in a Study to Estimate