Set rating??

cosmicdebris

Ok guys what is the calculation to figure out your sets rating in a set that is weighted?

Dennisl

Take the coin grade of each coin in the set and multiple it by the weight assisgned. Add of the total from this and divide by the sum of all the weights.

DeepCoin

Also, don't forget the bonus points for Full Steps, Full Bands, Full Bell Lines.. etc. I have calculated my set rating and it agrees with the Registry. I am about 47 percent complete, so it is a good test I think.

cosmicdebris

Dennis that will give you the Weighted GPA I want to know how to calculate the Set Rating.

Hey wait a minute when you are %100 percent complete shouldn't the Weighted GPA and the Set Rating be equal?

dddangerousdan

Yes they will be the same on a set that is 100% complete.

DAN

BowAxe

The wording in the Rules is quite confusing, and I do not think the "weighted grade point average"
and the "set rating" are the same thing at all. In fact, I do not see what purpose the "weighted grade
point average" serves. The illustration below shows what I mean, based on a hypothetical set
consisting of just three coins. Coin A has a weight of 2, coin B a weight of 4, and coin C a weight of 10.
Coins A and B have several graded MS70, but coin C has never had any graded over MS69, so the finest
possible set has coins A and B in MS70 and Coin C in MS69.

First, consider the finest possible set:

[NOTE: The columns in these tables below don't line up correctly when I preview this message, so
it's no telling what you will see when I post it.]

COIN WEIGHT GRADE
A 2 X 70 = 140
B 4 X 70 = 280
C 10 X 69 = 690
___ ____
Sums 16 1110

The Rules state, "The grades are multiplied by the weights. That total is divided by the total number
of coin weights. That gives the 'Weighted Grade Point Average'." The total number of coins weights
in the set is three (three coins), so 1110 divided by 3 = 370, the "weighted grade point average".

The "set rating", on the other hand, "is achieved by dividing the weighted grade sum by the total sum
of the weights in the entire set." The total sum of the weights is 16, so 1110 divided by 16 = 69.37
which is the set rating of the finest possible set.

Now, old Numbnuts, Registry Message Boards habitue, decides to enter his set. His set is complete,
because he has all three coins. His coin A is MS68 and B and C are both MS69:

COIN WEIGHT GRADE

A 2 X 68 = 136
B 4 X 69 = 276
C 10 X 69 = 690
____ ____
Sums 16 1102

Going through the same calculations as for the finest possible set, one arrives at a weighted grade
point average of 367.33 and a set rating of 68.87 for Numbnuts' set. Note that this is not a set
that has bonus points which would have to be taken into consideration for each coin when the
individual grade for that coin was calculated.

Have I figured this correctly? If so, it still seems to me that the weighted grade point average is a
superfluous factor--I don't see what it's used for, and it just causes pointless confusion.

BowAxe

NEVERMIND! I've been looking at the sets, and it is obvious that I had a misconception about the
weighted GPA and how to calculate it. It appears to be calculated the way I was trying to calculate
the set rating. You can throw out my comments.

clackamas

To move up in any considerable fashion you need coins. The grade for the registry only matters at the top. You could fill an entire set with EF coins and be in the top 10 or 20 in any set. The grades matter in breaking the top tier. To me its more fun just to collect. I go after a certain date and when its done on to the next so I don't worry (anymore) about moving up too fast by filling spots. But if you want to move fast fill holes, its the way to go.