We will find a range everywhereIf we minutely observe the values of parameters pertaining to materials and matter around us then we use some units to specify those contents. For example length can be measured in metres, weight can be measured in grams, milk volume can be measured in litres, and so on.
We specify and mention the quantity or values of these items and while doing that the concept and importance of the term 'range' enters the scene.
Range is a very interesting concept. Though we talk of exact values but generally values will be slightly different from each other. Values and measurements generally lie in a range. It could be a very narrow range but range will be there.
Let us see some examples where range comes in picture. If someone asks us what time we generally take dinner then we might tell that it is 8 to 9 PM. So the range is 8 to 9 PM. Similarly a shopkeeper selling lose items will deliver the items to the customer in a range. If the ccustomer asks for 300 grams of an item the shopkeeper can give say something in the range 300 to 320 grams. He does not bother for that extra 20 grams as a goodwill gesture. All statistical derivations are based on the phenomenon of range. Repeated physical or scientific measurements also vary in a range generally a narrow one.
Have you also observed such ranges existing around?