Normal distribution 23 Statistics 21 normal distribution 17 Normal Distribution 11 Probability 8 Social sciences 8 Correlation 6 Statistical methods 5 Regression 4 sampling 4 Frequency distribution 3 frequency distribution 3 probability 3 Biology 2 Biometry 2 Central tendency 2 Distribution (Probability theory) 2 Frequency Distribution 2 Mathematical statistics 2 Mathematical statistics -- Textbooks--Life sciences -- Statistical methods -- Textbooks--Life sciences -- Statistical methods 2 Operations research 2 Probabilities 2 Random sampling 2 Sampling 2 Statistical methods - agricultural workers 2 correlation 2 distribution - 2 distribution - t 2 regression 2 Algorithms 1