### Table of Contents

#### Research Article

A Two Parameter Ratio-Product-Ratio Type Estimator for Population Coefficient of Variation based on Simple Random Sampling without Replacement | |

Nitesh Kumar Adichwal, Rajesh Singh, Prabhakar Mishra, Poonam Singh, Zaizai Yan | 1-5 |

Combined-Type Estimators of Finite Population Mean Using Double Sampling Scheme under Non-Response | |

Manoj Kumar Chaudhary, Amit Kumar | 6-18 |

Probability Theory in Relational Structures | |

Mark Burgin | 19-29 |

Reliability Estimation for Lindley Distribution under Type-I Progressive Hybrid Censoring Scheme | |

Vaishali Gupta, Jitendra Kumar, M. S. Panwar, Sanjeev K Tomer | 30-41 |

The Use of Technology in the Teaching of Mathematics in Jamaica | |

Paul Andrew Bourne, Carol Henry McBean | 42-67 |

ISSN: 2455-7021