Statistics is a collection of methods for planning experiments, obtaining data, and then organizing, summarizing, presenting, analyzing and drawing conclusions based on data. Alternative Definition Statistics comprises of methods for collecting, compiling, summarizing, analyzing and inferring from data. Any information is data. Data So data does not have to be a number. Okay now we know what data is.
Statistics is a way of answering questions to some difficult problems.
In reality we are always interested in some question. Is the sum total of all individuals and objects in a study. However, due to time and money restrictions we cannot study the entire population always. So what is done is we study a part of the population. This is called a sample.