I am using "relative use" to determine a "demand" variable to assist me
in allocating my library materials budget between various component collections.
= number of times books are picked up or "used" for each component collection
= number of volumes, or books, in a component collection
= total number of uses for all component collections
= total number of volumes in all component collections
= relative use, or
= demand, or
The problem is that it is not behaving how I would expect:
the sum total of the demands of all component collections does not equal
the demand for the entire collection as a whole.
Where is my math going wrong, if this expectation is correct?
Here are my numbers.
Where did the - and -values come from?
. . They are all wrong!
You said: .
Then in the first row (Fiction), we should have:
Even if the -values are correct, the -values are off.
. . But all the -values are wrong!
You said: /
In the first row (Fiction), we should have: