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11-20-2013, 03:05 PM
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#1 |
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i'm sorry, what?
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need math help
i'm drawing a blank here.. at the back of my mind i know what the answer is but i can't put it into words
i need to scale a bunch of numbers in terms of a scale of 0-100% my min number is 5 and my maximum number is 90... what's the formula to break it down? (so 5=0% and 90=100%) i'm so close i can feel it...
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11-20-2013, 03:14 PM
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#2 |
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um i'm in calc 3 but never taken stats, i would assume it would have to do with the total spread ? so your total spread is 85...and if you had say 10 of 85 it would be 10/85 = 11.76%
so for example you would add 10 to your min (5) to make it 15. 15 would be 11.76% of your spread? i have no clue. |
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11-20-2013, 03:18 PM
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#3 |
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i'm sorry, what?
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no, what you're doing is when you're not concerned with min and max and are just working within a set parameter,
in my case, the 5 is the 1% and the 90 is the 100% did some internet digging.. couldn't find a math formula but i found an excel formula NewValue = (((OldValue - OldMin) * (NewMax - NewMin)) / (OldMax - OldMin)) + NewMin lets see if this bitch works
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11-20-2013, 03:20 PM
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#4 |
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i'm sorry, what?
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IT WORKS!
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11-20-2013, 03:35 PM
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#5 |
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good to hear, come back to me when you need calc help haha never took stats :P
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11-20-2013, 04:17 PM
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#6 | |
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Y= m*X+b
You have two data points, (5,0%), (90,100%) m= 100/85 (rise over run) = 1.1765 b= where the formula hits zero, so take your 'm' value and plug in one of the two points and solve for b I got the following: Y=1.1765*X-5.8824
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