Box-whisker plot
What is the Box and whisker plot? Box and Whisker plot is the visual representation of continuous/quantitative parameters using median and quartile distribution of data. Box and whisker plot can be done both Horizontal and Vertical ways. The box which denotes median and quartiles extends lines which represent the upper and lower limit of the […]
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Type of probabilities in a contingency table
There are three types of probabilities for contingency table/crosstabs. They are: Marginal probabilities Joint probabilities and Conditional probabilities. Suppose data is collected in a study of 165 students about their gender and insomnia status. After the collection of data, following 2×2 contingency table is generated: Table 1: Contingency table of Insomnia by Gender Marginal probabilities: […]
Read MoreSimple Linear Regression
What is Simple Linear Regression? The simple linear regression is a linear regression model which has a single explanatory variable. It has two-dimensional sample points with one independent variable (x) and one dependent variable (y) and finds a linear function that is accurate and predicts the dependent variable values as a function of the independent […]
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Global research community deserves a better ecosystem
Research has emerged as the most critical component for professional growth of individual researchers and institutions. But majority of the global scientific community is working in a fragmented research ecosystem. A quick look at the critical elements of a research ecosystem can help us in understand the glaring system deficiencies in which researchers are operating […]
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China expected to go way ahead of other countries in science and engineering publications output in future years
China is leading the way with 22.9% of total published Science and Engineering (S&E) articles throughout the world as per the latest data (2018) from National Science Foundation. United States is just behind China with 21.5% of the total published S&E articles. In Europe, United Kingdom and Germany are the leaders in publications output. India […]
Read MoreSimpson’s Paradox
Let’s take an example of a 2×2×2 table below with result as response variable (Y), opponent’s region as explanatory variable (X) and opponent’s ranking as control variable (Z). Table 1: Game result of a team by opponent’s region and opponent’s ranking Given the condition that the opponent’s ranking is high, win percentage of a team […]
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Data visualizations for common statistical tests
Data visualization methods can summarize the results of your research in a graphical summary for easy understanding. Here are some of the best data visualization techniques for common statistical tests: 1) Chi-square test or Fisher exact test: For tests where both the variables are categorical like chi-square test and fisher-exact test, bar-charts are most commonly used. […]
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