Based on the data bellow, what would the effect size be?
Group one 12 and group two 11.
Standard deviation 3.
To calculate the effect size, you can use Cohen's d formula:
Effect Size (d) = (Mean Group 1 - Mean Group 2) / Standard Deviation
Given the information you provided:
Mean Group 1 = 12
Mean Group 2 = 11
Standard Deviation = 3
Plug these values into the formula:
Effect Size (d) = (12 - 11) / 3
Effect Size (d) = 1 / 3
Effect Size (d) ≈ 0.333
Therefore, the effect size would be approximately 0.333.