eng Science and Education Publishing American Journal of Applied Mathematics and Statistics 2333-4576 2014-05-22 2 3 163 167 10.12691/ajams-2-3-12 AJAMS20142312 article Estimation of Population Total in the Presence of Missing Values Using a Modified Murthy's Estimator and the Weight Adjustment Technique Oyoo David Odhiambo 1 Christopher Ouma Onyango chrisouma2004@yahoo.co.uk 1 Department of Statistics and Actuarial Science, Kenyatta University-Kenya Use of Murthy's method in estimation of population parameters, such as population totals, population means, and population variances has been limited to surveys where survey data values are complete. This study applies weight adjustment technique to estimate a population total under simple random sampling without replacement. The asymptotic properties show that the estimated population total is sufficient for the true population total. The proposed estimator is obtained by symmetrizing Murthy's estimator. http://pubs.sciepub.com/ajams/2/3/12/ajams-2-3-12.pdf Murthy's estimator missing values weight adjustment