Power calculation for cross-sectional study

[bshiferaw27]

Hello,

  I wanted to conduct a power calculation for sample justification. The study is a cross-sectional study with a predictor variable that is Dichotomous and an outcome variable that is also Dichotomous. How would I calculate the power for sample size justification using a chi-square test on SAS? 

Thank you in advance!

[ksumbundu]

PROC POWER;

 TWOSAMPLEFREQ TEST=PCHI

 GROUPPROPORTIONS = 0.8 | 0.6

 POWER = 0.8

 NTOTAL = .

;

RUN;

Hi, try this code.