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Hi! Could you please help me with this hw assignm...

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Question

Hi! Could you please help me with this hw assignment? Thanks!,I have this equation on my notes: N=S^2*((Z,alpha + Z,beta)/E^2) N: Total number of subjects require Z,alpha: the standartd normal deviate for alpha (Z,alpha=1.96 if alpha=0.05 and two-tailed and Z,alpha=1.645 if alpha=0.05 and one-tailed) Z,beta: the standard normal deviate for beta (Z,beta=0.84 when beta=0.20) S: standard deviation of the outcome variable, chosen be conservatively large if more than one value was found in the literature E: expected effect size

 

Paper#11707 | Written in 18-Jul-2015

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