calculate power, I look at the vector V2, and count the number of times it\'s greater than 0

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Hi, I have 2 vectors (V1, V2), generated from 1000 randomized permutations. So, each vector has 1000 numbers. I will like to do a ttest, and determine the pvalue and power of the test. V1 is the vector generated under null hypothesis (with mean 0)

Null Hypothesis: mean(V1)=0

Alternative Hypothesis: mean(V2)=mean(V2)

To calculate p value, i look at the vector V1, and count the number of times the numbers in V1 is greater than the mean of V2?

To calculate power, I look at the vector V2, and count the number of times it's greater than 0?

Thank you

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