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RE: Re: NGC vs PCGS - The Facts of the Stats.

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NumisGuard

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These statistics can be helpful..if you use them the right way

True, you can not simply take the total results by grade and make any reasonable determination by comparing these numbers, but you can however, compare percentages. Granted you need to have decent sample so your results arte completely skewed but these numbers would then have meaning. For example....

If company A grades 5000 quarters (keeping it simple here)

and grades:

50 of those quarters as MS70

1000 of those quarters as MS69

2000 of those quarters as MS68

While company B grades 10000 quarters

and grades:

80 of those quarters as MS70

1900 of those quarters as MS69

3000 of those quarters as MS 68

Then who is the tougher grader?

Company A

Grades 1% of the quarters it sees as MS 70

Grades 20% of the quarters it sees as MS 69

Grades 40% of the quarters it sees as MS 68

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Company B

Grades 0.8% of the quarters it sees as MS 70

Grades 19% of the quarters it sees as MS 69

Grades 30% of the quarters it sees as MS 68

So even though Company B has alot more quarters graded in MS70 and MS69 they are still the tougher grader.

Percentages are much more appropriate when trying to compare how two companies compare to each other. Just keep in mind that coins small overall totals(total # of that coin graded by a company) may skew results as they do not provide a deep enough pool of information to analyze.

http://NumisGuard.com - Protecting Collectors One Coin at a Time

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