theory of sampling meaning in Hindi

• नमूना-परीक्षण सिद्धांत • प्रतिदर्श सिद्धांत

theory: वाद विद्या
theory of: जनसंख्या संरचना
of: स् का की पर बाबत
sampling: प्रतिदर्शन नमूना

So on the Republican side the strategy has shifted from fighting the theory of sampling to fighting the mechanics of it.
With J . Neyman and E . S . Pearson he made significant contributions in the statistical theory of sampling which was instrumental in his subsequent research in sampling theory of survey and improvement of agricultural statistics in India.