Return to Answer

    qweibull(1-.15, shape=.5, scale=1)
    # [1] 3.599064

    1-pweibull(.88, shape=.5, scale=1)
    # [1] 0.3913773

    qweibull(.15, shape=.5, scale=1, lower.tail=F)
    # [1] 3.599064

    pweibull(.88, shape=.5, scale=1, lower.tail=F)
    # [1] 0.3913773

(Attempting to) solve for the shape parameter. This fails; it seems that it is impossible to have a 15% censoring rate at a censoring time of .88 with a Weibull distribution where the scale parameter is held at 1, no matter what the shape parameter is:

(Attempting to) solve for the shape parameter:
This fails; it seems that it is impossible to have a 15% censoring rate at a censoring time of .88 with a Weibull distribution where the scale parameter is held at 1, no matter what the shape parameter is.

(Attempting to) solve for the shape parameter. This crashes; it seems that it may be impossible to have a 15% censoring rate at a censoring time of .88 with a Weibull distribution where the scale parameter is held at 1, no matter what the shape parameter is:

(Attempting to) solve for the shape parameter. This fails; it seems that it is impossible to have a 15% censoring rate at a censoring time of .88 with a Weibull distribution where the scale parameter is held at 1, no matter what the shape parameter is: