How to Find the IQR. IQR stands for Interquartile Range, and it is used in statistical analysis to help draw conclusions about a data set. It is often preferred over the range in measuring the spread of a data set, because it excludes most outliers.You can learn how to find the IQR by reading the following:he IQR is defined as the difference between the upper quartile and the lower quartile of a data set, sometimes written as Q3 - Q1. Ad. 2. Organize your numerical data set in ascending order.
The Mesozoic era is centred between two mass extinctions, the Permian-Triassic event and the Cretaceous-Poleogene event. The Permian-Triassic event was the largest mass extinction in our world's history.
Triassic Period Facts The Triassic Period was the first period of the Mesozoic Era. A lot happened to Earth and its life-forms during the Triassic but the most celebrated event was the evolution of dinosaurs. These remarkable creatures emerged around 230 MYA and dominated the planet throughout the Mesozoic Era.