Measures: Central Tendency

Measures of Central Tendency

In many cases when we collect data, we determine where they tend to gather. We want to find where the 'crowd' of numbers is. This is called the measures of central tendency. The three main measures of central tendency are the mean, median…
Meeting the demand of data scientists

Evolution of Data Science

Though data analysis is not new, future applications of it will depend on advanced data scientists with analytical skills and experiences utilizing statistic models. The following events have contributed to the evolution of data science…
Data Needs Context

Not the Full Story: Data Needs Context and Comparison

Analyzing data – finding means and medians and standard deviations and other related numbers – is important for making decisions. But often, the whole story of the data also includes comparing your results to the results of others. This…
Overcoming Assumptions

Deep Analysis Overcomes Assumptions

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The story of the missing bullet holes is a legendary one (in the world of statistics and military air history). The tale is one of insightful analysis overcoming the assumptions made by most of those who were analyzing the data. The story is…
Sampling Techniques for Populations

How Many Deer Are There? Sampling Techniques to Estimate Populations

A 2014 BBC report states that the world population of tigers is 3,000, down from 100,000 forty years ago. How are organizations, such as the London Zoological Society, able to determine this since animals do not stay still and allow themselves…
Linear Regression Model

The Linear Regression Model

Data is often used to make predictions. Actually, that is a primary reason for data analysis. The information is often used to predict what will happen in the future. Sales data, say for a specific product, is used to predict how much of that…
Maching Learning Brain

What is Machine Learning? How Does it Help Society?

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Machine learning is a type of artificial intelligence (AI) that provides the ability of a system to use data and experience to improve its performance. This entails a system learning without being programmed. Simply put, machine learning is…
hadoop

Hadoop: Is it here to stay?

Hadoop revolutionized Big Data with its ecosystem of open source components, however the debate remains – has this revolutionary tool's best day already passed? With a number of other Hadoop-related products surfacing such as Spark, Hive and…