BASIC STATISTICS

STATISTICS

It is science of  data which is mainly concerned with collection,organizing,analysis and interpretation of data by providing suitable conclusion. For eg. data from healthcare, data of company sales.

Some terminology of Statistics:

1. Data: It is collection of meaningful information presented in proper format.

                                                                        

1.Primary Data: The data which is collected by  directly asking the questions related to research to people or respondent  and recording the responses. Some research do this by going on ground and asking to respondent and collecting data.For e.g. Take the election exit-pool where the company asks voters whom they voted,collect all data and prepare necessary conclusion,then they sell their conclusion to various news agency whom they  had tie-up.

2. Secondary Data: The data which can be collected through other sources, as the company collect it from research or data-collection which are into this business. For e.g product-based company who is launching a product want to study competitor product they take the help of company like IPSOS who has conducts and give data to the company.

Variables:

It is an attribute which describes a person,place,thing.It can vary from one entity to other.

for e.g, a person hair is a variable and person to person it changes.

1.Qualitative: It can take the values that are names or directly write the interview process which are taken by company,the customer and their view -points.

2.Quantitative:  It can take the values that are numbers, or convert it in numbers.for e.g population of a country.

1.Discrete:Variables which can take only finite set of values,i.e. 1,2,,6,7,8 etc.

2.Continous: If a variable can take on any value between its minimum value and its maximum value, it is called a continuous variable.for e.g. the fire department mandates that all fire fighters must weigh between 150 and 250 pounds.

Univarite and Bivarite:

1.Univarite: When we look for only one variable,for example, that we conducted a survey to estimate the average weight of high school students.

2 .Bivarite: When we look for two or more variable,Suppose we conducted a study to see if there were a relationship between the height and weight of high school students.