If a tree dies and the trunk remains undisturbed for 14560 years,what percentage of original 
is still present? (half-life of 
= 5730 years)
Definitions:
Population Standard Deviation
The standard deviation of the entire population under study, representing the total variability within the population data.
Observed Z Value
A standardized statistic that represents the number of standard deviations a data point is from the mean of a distribution.
Sample Mean
The average value of a sample set of a population, used as an estimate of the population mean.
Population Average
The mean value of a particular characteristic in a specified population, representing a central tendency.
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