Ttest 
Mean 1: 0 
Mean 2: 0 
N1: 0 
N2: 0 
Std Dev.1: 0 
Std Dev.2: 0 

COMPARE TWO POISSON COUNTS t (0.025) for 95% CI= 1.9608 BINOMIAL PROPORTIONSmean1 eq: 0 (variance= 0) mean2 eq: 0 (variance= 0) Difference between means: M1M2=00=0 sd=0; se=0 95% CI of difference: 0 <0< 0 (Wald) zdifference: 0; p= 0.5 (left p: 0.5; two sided: 1) 
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More: Two by Two table analysis Chi squares, Risk Ratios, Odds Ratios and other table statistics Fisher exact testStudy the Rate Ratio Mean2/Mean1=0/0=0Calculate the minimum Sample Size required to see if the difference between 0 and 0 is statistically significantCalculate CI around Mean1= 0.Calculate CI around Mean2= 0. 
