1. CVR College of Engineering,Department of Statistics,Hyderabad,Telangana,India
2. Sri Venkateswara University,Department of Physics,Tirupati,Andhra Pradesh,India
3. Osmania University,Department of Statistics,Hyderabad,Telangana,India
4. Sri Venkateswara University,Department of Statistics,Tirupati,Andhra Pradesh,India