Reply to Thread

Message:: [QUOTE="rrdenarius, post: 2742196, member: 75525"]Can you post a good pic? I think the coin is ok, but wonder if it is a fouree. If you are not into statistics, skip the rest of this post. I think the coin is a bit on the light side. I did a quick search for Julia Mamaea Denarius on acsearch.info and had 1400 matches. The first 20 were similar numbers to [USER=75937]@Roman Collector[/USER] .RC's coinsaverage = 3.14 g with 0 examples that weighed below your coinSt Dev = 0.30 gbottom of a 3 sigma range = 2.23 this data would say it is at the bottom end of the confidence curveacsearchaverage = 3.02, but there were 2 examples that weighed below your coinSt Dev = 0.40your coin is 2 sigma below the average, the bottom of a 3 sigma range = 1.83 or you have a 5% chance of being outside the normal distribution for this data. I do this math when looking at Roman Republican coins that are either heavy or light. If I can find other examples of similar weight and the picture looks good, I say the coin should be ok. But... I look for places the plating of a fouree cracked. If you like the coin and the price is right, buy it. For the normal distribution, the values less than one standard deviation away from the mean account for68.27% of the set; while two standard deviations from the mean account for 95.45%; and three standard deviations account for 99.73%.[/QUOTE]