If the probability of committing a Type I error is set at 0.10, then the probability of committing a Type II error will be 0.90, since sum of probabilities must be 1.0.

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The probability of committing a Type II error is not necessarily 0.90 just because the Type I error probability is set at 0.10. The probability of a Type II error depends on several factors, including the sample size, effect size, and level of significance.

If the Probability of Committing a Type I Error Is