Jagsstat-Blog Statistics -An Introduction to Statistics

  Data are information collected from various sources in various forms. These data are analyzed to get meaningful conclusion and insights about the dataset. A single datum is hardly useful. We usually require a dataset consisting a series of datapoints to carry out any analysis or get to a conclusion. This series of datapoint traces the path on which the variable under consideration moves. This traced path can be very useful to understand the pattern of the data and also predicts its future movement. To understand the pattern, we need to consider certain characteristics of the path. The points when plotted on graph paper, the traced path takes the form of a curve. And the characteristics of the path such as mean, variance, kurtosis and skewness can be found out using moments. These are two types of moments- raw and central. Central moment measures the deviation of datapoints from mean. Whereas, raw moment measures the deviation of datapoints from 0.   The 1 st order raw momen...

  As fascinating as numbers are to some people, they appear as nightmares to many . Before a mathematics or statistics exam or before presenting something with statistical analysis we often become anxious which makes it all messed up for us, messing all our hard work and preparations. But are numbers really that scary? Is statistics that scary? Or is statistics just scary numbers? Let me tell you what, statistics is not just numbers but ‘story telling numbers.’ This is the magical power that statistics possess. Numbers by themselves are just numbers that we have already learnt in our prep days, but statistics provides voice to those numbers so that they can tell their own stories.   We are all well acquainted with the story that we often make fun of while exaggerating them a bit- Our fathers' famous tale about how they have climbed mountains, swam across oceans, walked through deserts to reach their schools. As over overexaggerated those stories are they are something we remem...