## How to Calculate Interquartile Range (IQR) and Semi-interquartile Range or Quartile Deviation

Interquartile Range Interquartile range (IQR) is a measure of spread, based on quartiles, that still maintains the idea of range, but is not influenced …

Interquartile Range Interquartile range (IQR) is a measure of spread, based on quartiles, that still maintains the idea of range, but is not influenced …

Translation: Change of origin without any change in the direction of the axes Let the co-ordinates of a point P with respect to a …

Transformation of Rectangular Axes: Translation, Rotation Read More »

Karl Pearson’s Coefficient Method Karl Pearson’s method of Coefficient of correlation is also known as Pearsonian coefficient or correlation or product correlation method. Let …

Scatter Diagram Method Scatter Diagram Method is the simplest method of studying the correlation between two variables. In this method, the values of one …

Correlation Correlation is a statistical tool used to study the relationship between two or more variables. Two variables are said to be correlated if …

Correlation – Definition, Types, Methods of Measurements Read More »

Mean Deviation Definition Mean deviation is defined as the mean of absolute deviations of the values from the central value.For individual series:\[MD\left( \overline{X} \right)=\frac{\sum{\left| …

Mean Deviation The Absolute Measure of Dispersion Read More »

Definition of Quartile Deviation Quartile Deviation divides the total frequency in to four equal parts. The lower quartiles Q1 refers to the values of …

Quartile Deviation the Absolute Measure of Dispersion Read More »

Range Definition Range is the simplest method of studying variation. It represents the differences between the values of the extremes. It is the difference …

What is Standard Deviation? Standard deviation is the root of sum of the squares of deviations divided by their numbers. It is also called …

Here we will see how obvious the pigeonhole principle is. Its proof is very simple, and amazingly, it has several useful applications. Let us start …

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