A Psychologist Finds a Significant Difference Between Two Conditions

Multiple Choice

A psychologist finds a significant difference between two conditions. She is very happy, and repeats the study. This time, she finds no significant difference. She runs the study ten additional times, failing each time to find a significant difference. There is a good chance that the significant difference she found the first time

A) was a Type I error
B) was a Type II error
C) could have been either a Type I or Type II error