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Data recording, analysis and presentation

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Question 21

A researcher investigating the effectiveness of a new cognitive therapy decides to reduce the significance level of their statistical analysis from 5% (α=0.05\alpha = 0.05α=0.05) to 1% (α=0.01\alpha = 0.01α=0.01).

Which of the following correctly describes the effect of this change on the probabilities of committing Type I and Type II errors?

The probability of committing a Type I error decreases, while the probability of committing a Type II error increases.

The probability of committing a Type I error increases, while the probability of committing a Type II error decreases.

The probability of committing a Type I error decreases, while the probability of committing a Type II error remains unchanged.

Both the probability of committing a Type I error and the probability of committing a Type II error decrease.

Data recording, analysis and presentation Questions

  1. A Level
  2. /Psychology
  3. /Data recording, analysis and presentation