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Industrial societies typically define people in old age as
Standard Error
The standard deviation of the sampling distribution of a statistic, commonly used to measure how accurately a sample represents a population.
Null Hypothesis
The hypothesis that there is no significant difference or effect, and any observed difference is due to sampling or experimental error.
Normally Distributed
Refers to a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.
Confidence Interval
A range of values derived from sample statistics that is likely to contain the value of an unknown population parameter.
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