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I apologise in advance for my total idiocy with this one but its been a while since i did statistics and i`ve lost my book on it...
Here is the problem..
I survey a series of records (say 80) looking to see if a piece of information is recorded in them. I find that it isn`t recorded in any of them ie 0%.
6 months later i survey another series of different records..( say 90) and find that the information is recorded in 9 of them . ie. 9%.
So what is the % improvement in recording this piece of information...i know it isn`t 9%.
If the first survey had shown 1% recorded the info it would be a 900% improvement i think, but seeing as 0% was the initial result how do you calculate the improvement?
I`m sure this kind of thing was simple for me a few years ago! but as they say `if you don`t use it you lose it`
Amygdala.
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answer these they'll get you brain going
please use hide tags
[math]50%of 100= 50%of36= 1%of100=
25%of 100= 25%of36= 1%of200=
10%of 100= 10%of30= 1%of300=
Zappzter - New IM app! Unsure of which room to join? "ZNU" is made to help new users. c:
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50%of 100= 50 50%of36= 18 1%of100= 1
25%of 100= 25 25%of36= 9 1%of200= 2
10%of 100= 10 10%of30= 3 1%of300= 3
err thats not really that difficult but i would like an answer to my question.
amygdala
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I'd agree with you that you can't find an answer.
Percentage increase is defined as
.So normally, it would be fairly easy to just plug in the new and old values to get your answer, but in this case that would involve a division by 0 and so it can't be done.
Why did the vector cross the road?
It wanted to be normal.
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It is an increase of 9 Percentage Points (Note the word Points)
But as a pure percentage increase, mathsyperson is right.
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
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How many times is 9 as much as 0?
No. This problem is incorrect. "Times" is usually used to measure the relative scale between two values. 0 means vanity, nothing, so it isn't a value at all. The difference between 0 and 9 is not only that the latter is somewhat larger than the former, but also that nothing Vs something.
Something:Something=Ratio,Percentage
Something, Nothing-no need to compare. The improvement is substantial, not increamental.
X'(y-Xβ)=0
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Thanks for the help...i think that clarifies it! Basically i cant describe the improvement in terms of a `percentage improvement` ie 50% improvement or 75% improvement...but i could say there has been a 9% point improvement.
Amygdala
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but i could say there has been a 9% point improvement.
Smart answer!
X'(y-Xβ)=0
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