Practice manual are developed in accordance with the work program of the discipline "Technology of scientific researches ". It is intended for preparation of bachelors in specialty 185- "Oil and gas engineering and technologies". Методичні вказівки розроблено відповідно до робочої програми дисципліни "Основи наукових досліджень". Призначено для підготовки бакалаврів за спеціальністю 185 - "Нафтогазова інженерія та технології". CONTENT Introduction………………………………………………. 5 1. Estimation of measurement errors.……………..…...…… 6 2. Elements of the theory of dimensions of physical quantities 13 3. Similarity of phenomena and processes. Criteria of similarity………………………………15 4. Experimental studies……………………………………. 21 4.1 Planning of an experiment. Selection of factors of experiment planning and conversion of factors into conventional scale. Drafting of planning matrix………. 21 4.2 Definition of coefficients of linear equation of regression……………………………………24 4.3 Analysis of equation of regression. Evaluation of variance of reproduction or error of experiments……… 28 4.4 Evaluation of significance of regression coefficients…. 31 4.5 Evaluation of correctness of the model………………… 35 4.6 Methods of excluding minor factors and anomalous values……………………………… 38 4.7 Finding of parameters of empirical formulas………….. 43 References ………………..……….………………….…. 46