A researcher reports that there is a significant difference between two treatments at the .05 level of significance. This means that:
a. if the researcher repeated the experiment, there is a 95% probability that the same decision would be reached
b. the difference obtained in the experiment is at least 5% larger than the standard error
c. there is a 5% probability (or less) that the difference occurred simply by chance without any real treatment effect
d. the average score for one treatment is at least 5% smaller than the average score for the other treatment
Ans: C
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