One instrument that can be used is Median and quartile calculator.
There are three quartiles: the first quartile (Q1), the second quartile (Q2), and the third quartile (Q3). The first quartile (lower quartile, QL), is equal to the 25th percentile of the data. (splits off the lowest 25% of data from
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Mathematics is a branch of science that deals with the study of numbers, quantity, and space. It is a fascinating subject that can be used to solve problems in a variety of fields.
If you're looking for a fun way to teach your kids math, try Decide math. It's a great way to engage them in the subject and help them learn while they're having fun.