Presentation of Data
Presentation of Data: Presentation of data plays a vital role in interpreting a given data. It helps in visualizing the data in a systematic manner. Our ultimate goal is to extract information from the data. The presentation of the data is the first step towards the goal. In this tutorial, we will be learning some statistical tools and ideas which will help us examine the data in order to describe their main features. We term this examination as an exploratory data analysis . Why Important? It is really hard to interpret and analyze a big amou…
Classification of Data:
Introduction: Data contains some information about a certain group of individuals. The entire group of individuals that we want information about is called population or target population . Our interest is to study a part of the population and then to infer about the whole population. Such a part of the population is called a sample . Example: We want to study BMI (Body Mass Index) of Indian citizens. Here the population contains all the citizens of India. Now let's assume that we want to find out the average BMI of Indian citizens. Then t…
Why do we study "STATISTICS"?
Introduction to Statistics: The word statistics came from the word "STATE". The general interest to the Government of any state is to know about the socio-economic structures of the population. Especially the interests converge on the total number of residents, their monthly average income, daily expenditures, and the summary of collected tax, etc. All such information is nothing but a form of Data. That is why STATISTICS came from the word "STATE". Contents: 1. Why do we study "STATISTICS"? 2. Types Of …
Calculate Mean Deviation: R code
How to calculate mean deviation? Mean deviation is nothing but a measure of closeness of the data from the mean. There are three following steps to find out mean deviation. Step 1: Calculate the mean of the data given. Step 2: Find the absolute difference of each data points from calculated mean. Step 3: Calculate the mean of the absolute difference vector you got from step 2 Mean: If you have a data set of n elements (i.e., you have a vector of n real numbers). Now you want to represent your data with a single eleme…
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