Statistics for Maintenance Modelling: Continuous Lifetime Distributions 2

# Question 4¤

For the logistic distribution, what is the constraint on / so that F(0) = 0.001? Click on one of the options below, then click on "Check Answer".

1.37
4.73
5.81
6.91
None of these
Yes, that's right. F(t) = so 0.001 = 1/(1 + e^(/)).
Hence / = ln(999) = 6.91.
No, the answer is 6.91. This is because F(t) = so 0.001 = 1/(1 + e^(/)). Rearranging gives e^(/) = 999, hence/ = ln(999) = 6.91.