Researchers want to repeat this experiment with the number of sample units balanced between samples in a completely randomized design with a two-sample t-test eventually to be used for statistical...

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Extracted text: Researchers want to repeat this experiment with the number of sample units balanced between samples in a completely randomized design with a two-sample t-test eventually to be used for statistical analysis. They also want to achieve 80% power to reject the null hypothesis (HO: no treatment effect) at alpha = 0.05 when the difference between sample means is at least 16%. Previous studies have estimated that the standard deviation of percent time spent huddling among male voles of this species is 29%. How many voles should be assigned to each sample?