Muhammad Qaiser Shahbaz is Professor of Statistics at King Abdulaziz University, Saudi Arabia. He has published more than 100 journal articles and eight books. His areas of interest include mathematical statistics, survey sampling and statistical models. Saman Hanif Shahbaz is Associate Professor of Statistics at King Abdulaziz University, Saudi Arabia. She has published more than 50 research journal articles and three books. Her areas of interest include mathematical statistics and applied statistics. Muhammad Hanif is Professor of Statistics and Vive Rector Research at the National College of Business Administration and Economics, Pakistan. He has published more than 200 journal articles, in addition to a number of books.

His areas of interest include survey sampling, bio-statistics and statistical models.