We introduce a new class of continuous distributions named the Topp–Leone
odd log-logistic family, which extends the one-parameter distribution pioneered by Topp and Leone [A family of J-shaped frequency functions. J
Amer Statist Assoc. 1955;50:209–219]. We study some of its mathematical
properties and describe two special cases. Further, we propose a regression
model based on the new Topp–Leone odd log-logistic Weibull distribution. The usefulness and flexibility of the proposed family are illustrated by
means of three real data sets.