It depends on the test and the dates used. It has more precision when there is a significant amount of radioactive decay products. If it is using something like carbon 14 and the times are relatively recent like 10,000 years ago, then the dates are very precise because it has been calibrated by tree rings. The problem with C14 is that it varies depending on solar cycles so is less accurate from 10,000 to 50,000 years ago. There is so little of of C14 left after 50,000 years that most instruments can't give a precise date older than that. That methods isn't very precise. Some other have greater potential like potassium argon or Uranium lead but the half life is much longer so they are only good at very distant times in the past. They can have several figures of accuracy. There are unknowns like how much volatility there is in crystals so the methods need to be cross checked. When you get several of them agreeing the method is validated. They are going to be very accurate for the most part.
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very accurate