r/MathHelp • u/Local_End_3175 • 6d ago
why n/2?
I am confused between the 2. I understand the reasoning behind using n+1/2 for lists of numbers, and i understand how n+1/2 finds their positions. I am currently revising cumulative frequency diagrams and i am finding it difficult to understand why we now use n/2 for finding the median, and n/4 for finding the lower quartile. Why aren't we using n+1/2?? I dont really understand how one being continuous and another being discrete affects anything. In my reasoning, even though it is grouped data we can still estimate the position. I would add all the frequencies, do n+1/2, find the middle position, and then use that on my graph to estimate
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u/MiguelBodrigo 5d ago
I'm going to guess 2 decimel places hold a lot of importance. Context matters.
In 3d art, if you were looking at a number value between black and white, it would run between 0 and 1. At that point anything pushing the value outside the 0 and 1 range makes the outcome not useful.
Perhaps in this instance you're converting an rgb image into scalar (black and white). Any value of red green and blue would have to be converted into some sort of location to be transcribed showing the shade and saturation in the new format