Question: 28. When a researcher rejects his null hypothesis when it is actually true, which type of error does he commit? A. Type I error B.

28. When a researcher rejects his null hypothesis when it is actually true, which type of error does he commit? A. Type I error B. Type II error C. Sampling bias D. Systematic error

20. When a researcher rejects his null hypothesis when it is actually true, which type of error does he commit? A Type I error B. Type II error C. Sampling bias D. Systematic error

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