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The inclusive book on "Agricultural Statistics, Mathematics and Computer Applications: At a Glance" explains theoretical aspects and gives an in depth information of various concepts in a sequenced manner. This book consists of Agricultural Statistics, Mathematics, Computer applications, and agricultural Economics. This book has also brought out Multiple Choice Questions in each unit. Unit I – Agricultural Statistics deal with Definition, Frequency distribution Measures of central tendency- Mean, Median, Mode, Geometric mean, Harmonic mean, Measures of dispersion, Range, Quartile deviation, Mean deviation, Standard deviation, Variance, Probability, Conditional probability, Theorem of probability, Bayes theorem, Discrete probability distribution Continuous probability distribution, Distribution- Binomial distribution, Poison distribution, Normal distribution, Sampling methods, Theory of testing hypothesis, Correlation, Regression, Analysis of variance, Design of Experiment Unit II - Mathematics deals with Real And Complex Numbers, Set Theory, Matrices, Eigen values and Eigen vectors, Vectors, Differential Calculus, Integral Calculus, Beta and Gamma Functions, Double Integral, Ordinary Differential Equations and Interpolation  

Statistics has originated as a science of statehood and found applications slowly and steadily in Agriculture, Economics, Commerce, Biology, Medicine, Industry, planning, education and so on. Sir Ronald A. Fisher, (1890 – 1962), who is called “the Father of Statistics”, drew many solid conclusions 1.2 Definition Statistics is the science which deals with the collection of data, organisation of data (or) classification of data, presentation of data, analysis of data and interpretation of data, which are known as the statistical methods. “Statistics is the science, technology and art of creating new knowledge.” –RA Fisher. “By statistics we mean, aggregate of facts affected to a marked extent by multiplicity of causes numerically expressed enumerated or estimated according to reasonable standard of accuracy collected in a systematic manner for a predetermined purpose and placed in relation to each other.” – Professor Horace Secrist

Number line Every real number occupies a position on the number line and conversely, every point of the line can be matched with a real number. Absolute value The absolute value of modules of a number is equivalent to the value of that number ignoring the sign. For example, the absolute value for -1 is 1, and the absolute value of +1 is also 1.The absolute value is defined by the symbol ?x?.

Computers: Input and Output Devices 3.1 Input Device Input devices are the pieces of hardware that allow to enter or input data into a computer. Keyboard • A computer keyboard serves as a data input device. • A keyboard is a device containing keys, each of which denotes an alphabet, number, or number instruction that may be served to a computer to do multiple tasks. • The keyboard is a significant input device, both computers and laptops use keyboards to enter commands into the computer. Mouse • Mouse is a pointing device. • The mouse is used to open various files and programs by directly clicking on the various icons on the system. • A mouse has three buttons on top and one trackball on the bottom, which are used to select and move the mouse. • A touchpad is provided as an alternative for the mouse on laptops, which aids in mouse pointer movement.

4.1 Principles of Economics • ‘Economics’ word derived from two Greek words, oikos (a house) and nemein (to manage) means ‘managing an household’ • Microeconomics: Study of the behavior of individual, small, isolated and disaggregated units. • Macroeconomics: Study of groups and broad aggregates of the economy. • Adam Smith wrote the book- “An Enquire into the Nature and Causes of Wealth of • Nations” or in short “Wealth of Nations” in 1776. • Adam Smith is known as father of modern economics. 4.2 Wealth Definition - Adam smith • Adam smith (1723 - 1790), in his book “An Inquiry into Nature and Causes of Wealth of Nations” (1776) 4.3 Welfare Definition - Alfred Marshall • Alfred Marshall (1842 - 1924) wrote a book “Principles of Economics” (1890) • Alfred Marshall defined “Political Economy” or Economics is a study of mankind in the ordinary business of life; it examines that part of individual and social action which is most closely connected with the attainment and with the use of the material requisites of well being”. 4.4 Scarcity Definition - Lionel Robbins • Lionel Robbins published a book “An Essay on the Nature and Significance of Economic Science” in 1932. • Robbins defined, “economics is a science which studies human behaviour as a relationship between ends and scarce means which have alternative uses”.