2021. Estimating the Scale Parameter for the Lindley Distribution - A Comparative Study of Waiting Time Analysis. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ). 43, 2 (Oct. 2021), 266–278. DOI:https://doi.org/10.55562/jrucs.v43i2.153.