Sample Size Calculator  ChiSquared Test  TwoSample TTest  Poisson Means  Survival Times
Question: Does the average value differ across two groups?
Sample 1  Confidence intervals and estimated difference  Sample 2  




Verdict:  No significant difference 

Hypothesis:  
Confidence: 
95%


If the experiment is repeated many times, the confidence level is the percent of the time each sample's mean will fall within the confidence interval. It is also the percent of the time the hypothesis will be accepted (i.e., no difference detected), assuming the hypothesis is correct. 