Object Statistic Pdf For Free

Statistics is defined as the science of collecting, organizing, presenting, analyzing and interpreting numerical data for the purpose of assisting in. making a more effective decision. Classifications: Depending on how data can be used, statistics is sometimes divided in to two main areas or branches.

The main purpose of using statistics is to plan the collected data in terms of experimental designs and statistical surveys. Statistics is considered a mathematical science that works with numerical data. In short, statistics is a crucial process which helps to make the decision based on the data.

Data is any numerical or. categorical data. Statistics is used to predict and make decisions. Describing is done through. statistical formulas, and analysis is interpretation of this data through statistical formula also.

The two main branches of statistics are descriptive statistics and inferential statistics.

We begin by introducing two general types of statistics: Descriptive statistics: statistics that summarize observations. Inferential statistics: statistics used to interpret the meaning of descriptive statistics.

Object statistics describe the data stored in the database. For example, they tell the query optimizer how many rows are stored in tables. Without this quantitative information, the query optimizer could never make right decisions, such as finding the right join method for small or large tables (result sets).

Data are individual pieces of factual information recorded and used for the purpose of analysis. It is the raw information from which statistics are created. Statistics are the results of data analysis - its interpretation and presentation.