After the data had been collected and analyzed, Dr. Koff concluded that the study results were significant when, in fact,they were not. Technically speaking, Dr. Koff made a:

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Dr. Koff's conclusion that the study results were significant when they were not is an example of a Type I error. This type of error occurs when a researcher rejects the null hypothesis (i.e. there is no significant difference between groups or variables being studied) when it is actually true. In other words, Dr. Koff falsely concluded that there was a significant effect or relationship in the data when there was not one.

After the Data Had Been Collected and Analyzed, Dr