e following data shows the ages of 10 people who donated blood in December 2012 . $$ 25 \quad 47 \quad 40 $$ Determine the mean in terms of $$ x $$. Determine the value of $$ x $$ if the mean is 36 . Show ALL calculations. Hence, determine the standard deviation. How many people have ages which differ from the mean by more than one standard deviation?

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The mean age is 36. The value of $$ x $$ is 41.33. The standard deviation is approximately 6.55. Two people have ages that differ from the mean by more than one standard deviation.

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