Evan's Awesome A/B Tools (home):

Sample Size Calculator  |  Chi-Squared Test  |  Sequential Sampling  |  Count Data  |  Survival Times  |  2 Sample T-Test

Question: Does the hazard rate differ across two groups? (Compare means instead)

Sample 1 ( blue ) Survival function with confidence bands Sample 2 ( red )
Enter survival times:



Enter survival times:



Verdict:   No significant difference (log-rank test; z = 0.0, p = 1.0)
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.

If you like this, check out Wizard — the easy Mac statistics app.