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What is a median in math?

What is a median in math? The median is the middle number in a sorted, ascending or descending, list of numbers and can be more descriptive of that data set than the average. Median is the middle number in a sorted list of numbers. To determine the median value in a sequence of numbers, the numbers must first be sorted, or arranged, in value order from lowest to highest or highest to lowest. If there is an odd amount of numbers, the median value is the number that is in the middle, with the same amount of numbers below and above. If there is an even amount of numbers in the list, the middle pair must be determined, added together, and divided by two to find the median value. The median is sometimes used as opposed to the mean when there are outliers in the sequence that might skew the average of the values.  You may like What is manifesting? What is electric Charge? What is Binary? What is physics? What is pH scale? What is quantum mechanics?

Physical change

Physical change

All chemical substances consist of one or more elements. Sometimes, changes occur only in the physical conditions of a substance leaving its chemical structure unchanged. This is called a physical change.

Physical change examples

A solid piece of ice, if kept at room temperature, absorbs heat from the environment and gradually melts into liquid water. Again, heating liquid water up to 100°C will see the water vaporize into the air. Here, all the molecular formulas of all three - water, ice, and vapor are the same - H2O. 

That means each molecule of them has the same two hydrogen and one oxygen atoms in them. Therefore, all three substances are the same, only their physical states are different - ice solid while water is liquid and vapor is gaseous. This kind of change is called a physical change.


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