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Mood, A. M., Graybill, F. A., & Boes, D. C. (2001). Introduction to the theory of statistics (3rd ed.). New Delhi: Tata McGraw-Hill Education Private Limited.

Mood, Alexander M., Franklin A. Graybill, and Duane C. Boes. Introduction to the Theory of Statistics. 3rd ed. New Delhi: Tata McGraw-Hill Education Private Limited, 2001.

Mood, Alexander M., Franklin A. Graybill, and Duane C. Boes. Introduction to the Theory of Statistics. 3rd ed. New Delhi: Tata McGraw-Hill Education Private Limited, 2001.