Statistics Homework Help
|Submitted on: Thu, 03 Jan 2013 06:26:45||Views: 368|
Statistics has arisen with a German word, statistic. The general meaning of statistics is science of counting. Statistics like many other sciences is a mounting discipline. Statistics deals with all aspects of collection, organization and interpretation of data. It uses mathematical theories of probability, compels order and regularity on aggregates of more or less different elements.
The importance of statistics in recent years cannot be over highlighted. Statistical studies have developed considerably. Statistics uses various tests, which includes chi-square test, z-test and t-test. With the help of these tests, testing of hypothesis, mean, mode, median are calculated. The quality of data is also improved by statistics. This quality of data includes the plan of experiments and survey sampling. Statistical models also provide different tools for prediction, calculation and forecasting, which covers wide scope. It is mainly used in academic discipline that includes natural and social sciences, government and business. It summarizes or describes a collection of data with the help of descriptive statistics. It has also scope in research.
Services those are provided by our organization are mainly related with rich content in statistics. This content provides the information that statistics is an important part in education field. It is used in planning. Statistics provides the interpretation of valued facts and figure, those are significant to planning. Statistical knowledge is also indispensable to the businessman. Thus, our organization formulates different plans and policies by using statistics. Our organization uses all the reliable and genuine sources for writing the content of statistics to the learners. For more details please visit our website http//:www.StatisticsHomeworkHelp.com
The term statistics has been derived from the word of the Italian origin i.e. Statista, which means Statesman. In todayâs era, the term statistics can be defined in three ways singular, plural and general sense. In singular sense, the term statistics can be defined as that branch of knowledge related to mathematics which deals with the systematic accumulation, tabulation, presentation, analysis and the interpretation of collected quantitative data. In the plural way, it can be defined as a set of quantitative facts and data's, while in the general sense, statistics can be divided into two parts namely statistical methods and statistical theory. Statistical methods are defined as those procedures and techniques which are used in the collection, presentation, analysis and the interpretation of the quantitative data's, and the statistical theory deals with the development and the exposition of the theories on which the statistical methods are based.
Statistics generally includes collection of the quantitative data, collection and presentation of this data's, frequency distribution, measures of central tendency, point measures, measurement of the variability, Skewness and Kurtosis, measures of correlation, sampling designs, use of the statistical tests, probability distribution, tests such as chi square, Z-test, ANCOVA, F-test, T-test etc.
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The origin of statistics took place in the mid of 17th century as per some scholars. Its scope was actually widened in 19th century. The mathematical foundation of statistics was laid in 17th century with the development of concepts like probability theory given by Blaise Pascal and Pierre de Fermat. Early statistics was always revolving around demographic and economic data that is why it is actually called stat-etymology. The study of collecting, organizing, and interpreting the data is said to be statistics. It also includes planning of data collection in context of design of surveys and experiments. It helps in improving the quality of data as it enables us to collect, rearrange and interpret the information.
Statistical tools and methods also help in predicting or forecasting the data. In addition to this, it can also generate the randomness and uncertainty in the observation, which helps a person in drawing inferences from the sample, which is being studied. This can also be referred as inferential statistics.
Statistical research is mainly applicable in investigating causality and drawing conclusion with effect of changes in the values of predictors or independent variables on dependent variable response. Basically, two types of causal statistics can be studied: experimental and observational studies and in both the studies the effect of differences of an independent variable on the behavior of dependent variable are observed.
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