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.
Reptiles Inherit The Earth. The Triassic Period is the first period of the Mesozoic Era. The great extinction at the end of the Permian period had brought the end to 90% of the living species on Earth.The Triassic was a time of growing new species to repopulate the planet. A New Era. This time was the beginning of a new era, the Mesozoic Era.eptiles Inherit The Earth. The Triassic Period is the first period of the Mesozoic Era. The great extinction at the end of the Permian period had brought the end to 90% of the living species on Earth.