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An ESP experiment is done in which a participant guesses which of 4 cards the researcher has randomly picked, where each card is equally likely. This is repeated for 200 trials. The null hypothesis is that the subject is guessing, while the alternative is that the subject has ESP and can guess at higher than the chance rate.
-Which of the following would be a Type 1 error in this situation?
A) Declaring somebody has ESP when they actually don't have ESP.
B) Declaring somebody does not have ESP when they actually do.
C) Analyzing the data with a confidence interval rather than a significance test.
D) Making a mistake in the calculations of the significance test.

Question

Use the following information for questions:
 An ESP experiment is done in which a participant guesses which of 4 cards the researcher has randomly picked, where each card is equally likely. This is repeated for 200 trials. The null hypothesis is that the subject is guessing, while the alternative is that the subject has ESP and can guess at higher than the chance rate.
-Which of the following would be a Type 1 error in this situation?
A) Declaring somebody has ESP when they actually don't have ESP.
B) Declaring somebody does not have ESP when they actually do.
C) Analyzing the data with a confidence interval rather than a significance test.
D) Making a mistake in the calculations of the significance test.

Quizplus · Accepted Answer

A Type 1 error occurs when the null hypothesis is incorrectly rejected, meaning in this context, it would be concluding someone has ESP when in fact they do not.

Use the Following Information for Questions