Recently, Koyuncu (2012) [3] proposed an efficient family of estimators for estimation of
finite population mean using information on the auxiliary attribute. In this paper, we propose
two improved estimators of finite population mean. The biases and mean squared
errors of the proposed estimators are derived up to the first order of approximation. It is
observed that the first proposed estimator is always better than the first family of estimators
adapted by Koyuncu (2012) [3]. An empirical study is carried out to demonstrate the
performance of the proposed estimators.