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. 2010 Apr;35(2):217–221. doi: 10.4103/0970-0218.66859

Table 3.

Parameters in Weibull and Exponential methods of survival analysis

Parameter Survival analysis method
Weibull method Exponential method
Hazard rate h(t)=λp(λt)p-1 h(t)=λ
Probability density function f(t)=λp(λt)p-1e-(λt)p f(t)=λe-λp
Survival function S(t)= e-(λt)p S(t)= e-(λt)