Important Request for Anyone Taking the PCGS Grading Challenge at the ANA Show - Data Processed

FlyingAl

I've been informed that all contestants will be able to view a spreadsheet of the guesses people provide on the grading test at the ANA.

I would be highly appreciative of any participant that could forward that to me, since I am unable to take part. It would be highly useful for research purposes.

Thanks!

MsMorrisine

maybe pcgs can do some post-processing and post guesses and analysis(like what you're doing now) online

FlyingAl

@MsMorrisine said:
maybe pcgs can do some post-processing and post guesses and analysis(like what you're doing now) online

I fully intend to compare it to the GTG results I'm doing now.

I have the data from NGC's 2024 contest (the one I participated in), but two datasets is always better than one.

WaterSport

I remember years ago at FUN David Hall held this contest and said anybody who gets 75% correct starts Monday.

WS

1madman

Here’s the document for you:

https://docs.google.com/spreadsheets/d/1FzyhGQ3EvpnFZl3fufECypJ8v2Dz-w80HKeXFX4dVPc/edit?usp=sharing

Coin #20 (the walking liberty half) was perhaps the trickiest of the group, and I even told Abby it was covered with the starting of pvc and should details grade, but would probably still straight grade. PCGS claims it’s a ms65 according to the answer guide.

pcgsregistrycollector

@1madman said:
Here’s the document for you:

https://docs.google.com/spreadsheets/d/1FzyhGQ3EvpnFZl3fufECypJ8v2Dz-w80HKeXFX4dVPc/edit?usp=sharing

Coin #20 (the walking liberty half) was perhaps the trickiest of the group, and I even told Abby it was covered with the starting of pvc and should details grade, but would probably still straight grade. PCGS claims it’s a ms65 according to the answer guide.

I don't got access

FlyingAl

@1madman said:
Here’s the document for you:

https://docs.google.com/spreadsheets/d/1FzyhGQ3EvpnFZl3fufECypJ8v2Dz-w80HKeXFX4dVPc/edit?usp=sharing

Coin #20 (the walking liberty half) was perhaps the trickiest of the group, and I even told Abby it was covered with the starting of pvc and should details grade, but would probably still straight grade. PCGS claims it’s a ms65 according to the answer guide.

I also unfortunately do no have access. Perhaps you could download a PDF?

mr1931S

@pcgsregistrycollector said:

@1madman said:
Here’s the document for you:

https://docs.google.com/spreadsheets/d/1FzyhGQ3EvpnFZl3fufECypJ8v2Dz-w80HKeXFX4dVPc/edit?usp=sharing

Coin #20 (the walking liberty half) was perhaps the trickiest of the group, and I even told Abby it was covered with the starting of pvc and should details grade, but would probably still straight grade. PCGS claims it’s a ms65 according to the answer guide.

I don't got access

no access here either

pcgsregistrycollector

@FlyingAl said:

@1madman said:
Here’s the document for you:

https://docs.google.com/spreadsheets/d/1FzyhGQ3EvpnFZl3fufECypJ8v2Dz-w80HKeXFX4dVPc/edit?usp=sharing

Coin #20 (the walking liberty half) was perhaps the trickiest of the group, and I even told Abby it was covered with the starting of pvc and should details grade, but would probably still straight grade. PCGS claims it’s a ms65 according to the answer guide.

I also unfortunately do no have access. Perhaps you could download a PDF?

make ur own copy of the document @1madman then update perms to all

Davidk7

@1madman said:
Here’s the document for you:

https://docs.google.com/spreadsheets/d/1FzyhGQ3EvpnFZl3fufECypJ8v2Dz-w80HKeXFX4dVPc/edit?usp=sharing

Coin #20 (the walking liberty half) was perhaps the trickiest of the group, and I even told Abby it was covered with the starting of pvc and should details grade, but would probably still straight grade. PCGS claims it’s a ms65 according to the answer guide.

I thought the coin was fine, didn't really seem like it was terrible sludgy PVC.

davewesen

I asked for permission to view only results and received it (I was signed in on google chrome)

It is a spreadsheet with 55 rows for the 53 contestants (by entry number) with 24 columns with their answers
3 circulated AG03, F12, AU58 2 no grades damage, counterfeit

page 2 of spreadsheet shows Q#, correct answer, acceptable alternates. suffix
I cut and pasted some of page 2 below but columns all messed up

Question # Correct Grade Acceptable Alternates Suffix
Q1 MS64 RB MS60, MS61, MS62, MS63, MS65, MS66, MS67, MS68, MS69, MS70 RB
Q2 MS67 MS60, MS61, MS62, MS63, MS65, MS66, MS64, MS68, MS69, MS70
Q3 F12 F15
Q4 PR66 PR60, PR61, PR62, PR63, PR64, PR65, PR67, PR68, PR69, PR70
Q5 MS65 MS60, MS61, MS62, MS63, MS64, MS66, MS67, MS68, MS69, MS70
Q6 MS63 MS60, MS61, MS62, MS64, MS65, MS66, MS67, MS68, MS69, MS70
Q7 Unc Details - Damage AU Details - Damage, XF Details - Damage, Unc Details - Artificial Toning, AU Details - Artificial Toning, XF Details - Artificial Toning, Unc Details - Cleaning, AU Details - Cleaning, XF Details - Cleaning, No Grade - Counterfeit
Q8 AG03 AG02
Q9 MS67 MS60, MS61, MS62, MS63, MS64, MS65, MS66, MS68, MS69, MS70
Q10 MS62 MS60, MS61, MS67, MS64, MS65, MS66, MS63, MS68, MS69, MS70
Q11 MS66 FS MS60, MS61, MS62, MS63, MS67, MS65, MS64, MS68, MS69, MS70 FS
Q12 MS66 RD MS60, MS61, MS62, MS63, MS64, MS65, MS67, MS68, MS69, MS70 RD

it looks like a fun contest - I wonder if PCGS could show TrueViews )without cert number) of coins?

ElmerFusterpuck

I placed 13th in the contest, not too shabby.

Try this link for summarized results: https://docs.google.com/spreadsheets/d/1FzyhGQ3EvpnFZl3fufECypJ8v2Dz-w80HKeXFX4dVPc/edit?gid=1950116259#gid=1950116259

FlyingAl

I went ahead and processed the data here, the in person graders averaged 1.197 grade off on twenty coins. I threw out one entire grader as they had some (most) statistically significant outlying grades, so they were not included in the data.

The forums have been averaging 0.9 grades off based on images. NGC in person graders averaged 2.5 grades off.