You conduct an experiment, analyze the results, and obtain statistically significant effects at an alpha level of .01. Which one of the following statements is true?
a. You've made a Type I error.
b. You've made a Type II error.
c. The probability that the difference between the groups is due to chance is 1% or less.
d. The probability that the difference between the groups is due to a true effect is 1% or less.
Ans: C
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