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Can anyone provide with some advice? - thank you

I am required to calculate the sample size for two groups, given the following data:

Total sample N (group1+group2)=583

group 1: mean=8.35, SD1.07, N1=?

group 2: mean=8.11, SD1.32, N2=?

In case this extra infomation is useful: The total of N=583 subjects answered a 12-item questionnaire. Each item was scored on a scale of 1-10: 1=very poor, 10=excellent. The p-value between the two groups: p=0.02

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    Thank you for reading my post, I have edited my question and I hope it makes more sense now.2012-12-01

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I asked a very similar question only yesterday. If your samples are homoscedastic (can be assumed if subjects are randomly chosen) you can estimate the variance to behave reciprocally to sample size.

$\sigma^2 \propto \frac{1}{N} \Rightarrow N \propto \frac{1}{\sigma^2} \Rightarrow N_1=\frac{\frac{1}{1.07^2}}{\frac{1}{1.07^2} + \frac{1}{1.32^2}} * 583 \approx 352$