|
#1
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Joann
I was just looking again through ebay and a few of the other online auctions. I noticed by how many of the high-end T206's looked small. And it struck me - how often do you see a really big border on some of these high grade cards. |
#2
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: boxingcardman
(and yes I know it is lousy grammar) |
#3
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Frank Wakefield
The thing to measure is the size of the image, frame line to frame line. |
#4
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Frank Evanov
Excellent article on detecting T206 trimming by Dave Foreman in the Feb issue of the SGC magazine. The trick seems to be examination of the edges. This of course cannot be done in a card already slabbed. Size does not seem to matter. |
#5
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: John S
Actually, a sample size of 20 or above for each grouping (PSA 8 and raw VG's) would be sufficient to test significance. Using a t-test to compare averages (total width of all four borders on each card) between two groups would be the simplest and most powerful test in this case. Set the p-value at .05. Accurate measurements are a must...probably using a caliper of some kind. I believe that a board member has already made these types of measurements...cannot recall who that was. |
#6
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Kevin Saucier
<This of course cannot be done in a card already slabbed.> |
#7
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Richard Masson
but only assuming you can draw a truly random sample. The very act of collecting obliterates randomness. |
#8
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Frank Wakefield
Hey John, measuring the borders isn't enough... that's the falacy that trips up the grading folks. Gotta measure that box that the image is in. |
#9
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: John S
Frank, |
#10
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: boxingcardman
Gonna have to meditate on that one for a while. Sort of a brownian movement theory of collecting. |
#11
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Kevin Saucier
<has anyone here ever actually seen or done it? I hear a lot about it but it seems to me to be science-fiction. I would think that to get the card wet enough and malleable enough to cause it to move enough to make the process worthwhile would wreck the image. So my question is whether any of you have actual firsthand knowledge of this technique.> |
#12
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Bruce Babcock
I had a card rejected by PSA. A handwritten blurb said "does not meet minimum thickness requirement." I asked what this meant and they said the card had been pressed and trimmed. No mention of soaking was made. I no longer have the flip or the blurb, seeing no reason to keep them, and do not know who I talked with at PSA. This was about 10 years ago. |
#13
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Glenn
John is right on the sample size issue. |
#14
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Jason L
weigh them! |
#15
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Rob
Seems like T206's can be trimmed quite readily and not be detected, as compared to T207's and T205's, where trimming would readily show up on those issues. So you can get the PSA population report on these 3 issues and come up with statistical analysis and an argument of a high % of PSA 8 T206's could be trimmed. |
#16
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Eric B
Someone did a caliper test on an earlier thread. But it didn't consider the stretching part. But this is how you can prove the trimming of the PSA 8 Wagner. |
#17
|
|||
|
|||
Can trimmed cards in high grades be statistically proven?
Posted By: Joann
The process would be to measure cards from the VG and 7+ ranges drawn relatively randomly. Getting samples of 7+ cards that have presumably not been trimmed would defeat the purpose. The intent would be to take any X number - even just 100 - VG card measurements and any X number of 7+ cards measurements and compare them to see if they ARE different, not to try to make sure they are not different in drawing samples. |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
FS - 1954 Bowmans - SGC and BVG - high grades | Archive | 1920 to 1949 Baseball cards- B/S/T | 3 | 06-03-2007 12:51 PM |
Question about high end graded cards being trimmed | Archive | Net54baseball Vintage (WWII & Older) Baseball Cards & New Member Introductions | 31 | 01-22-2007 10:23 AM |
T206 backs....which is hardest to find in high grades? | Archive | Net54baseball Vintage (WWII & Older) Baseball Cards & New Member Introductions | 6 | 12-14-2006 06:31 PM |
SGC Grades trimmed W514's? | Archive | Net54baseball Vintage (WWII & Older) Baseball Cards & New Member Introductions | 12 | 06-10-2006 05:11 PM |
Change it up: Post you low grade, high grades! | Archive | Net54baseball Vintage (WWII & Older) Baseball Cards & New Member Introductions | 5 | 05-28-2006 06:58 AM |