According to standard convention, a researcher must be ___ % sure that the difference she observed between experimental conditions were not simply the result of chance in order to conclude that the difference is statistically significant.

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The standard convention for statistical significance is 95%, represented by a p-value of 0.05. This means that there is only a 5% chance that the observed difference between experimental conditions is due to chance alone. This level of confidence is widely accepted in scientific research.

According to Standard Convention, a Researcher Must Be ___