DOUBLE STAGE SHRINKAGE BAYES ESTIMATOR FORTHE VARIANCE OF NORMAL DISTRIBUTION WHEN THEMEAN IS UNKNOWN BY USE THE SHRINKAGE FUNCTIONWEIGHTED OF FIRST SAMPLE SIZE . Iraqi Journal of Science [Internet]. 2024 May 30 [cited 2024 Sep. 28];52(1):78-84. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/13329