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A normal distribution is not a naturally occurring phenomenon, but the assumption of normality is a basic premise for many statistical analyses. If your data is not normal, or approximately normal, certain statistical tests cannot be performed because the results obtained may…

IMPRESSIONS ON LIVING OLD Overview According to the PBS Frontline documentary Living Old, for the first time in American history “the old old” (those over 85) are the fastest growing segment of the U. S. population. Medical advances have enabled…