Statistics

  Arithmetic mean In statistics we use arithmetic mean before learning that see the fundamentals of statestics to understand this concept easily. Here are the set of formulas to solve the measures of central tendency Individual series If the data is given in individual series we should use           ∑ x      x̅=------ ⇒∑x = nx̅.                n Where n is no. Of observations given in data   If the values are in AP then  x̅= (a+l)/2  For Ex:- what is the mean of first 10 multiples of 8  Sol:- a is first multiple that is 8          l is last multiple that is 80  Now, mean =(a+l)/2. = (8+80)/2. = 88/2 = 44. If they asked assumed mean for individual series we have to assume, that means select a number of your wish from the given data and subtract that assumed number from every number in the data. This...

Fundamentals of statestics The word statistics is derived from modern latin . It has different names in different languages and countries. They are Status - latin Statista - Italian Statitix - Germen Statistique - French Usage Statistics is can be used in Economics, Accounts, Management etc.. Prof. Prasanta Chandra Mahalanobis is also known as the father of Indian Statistics.  Statestics may be defined as "science which deals with the collection, analysis and interpretation of numerical data" . Statestics have two different senses.  In singular sense, the scientific method that is employed for collecting, presenting and analysing data , finally leading to drawing statistical conclusion about some important characteristics of the data.  In plural sense, it is a quantitative or qualitative data that are usually collected with a view of analysis. Ex:- production of rice in india. Data means information collected through different sources. This data is 2 types, primary data ...