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Unemployed workers - Median, Mode and Standard Deviation

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The numbers of unemployed workers (in millions) from 1992 to 2001 are recorded below.
9.61 8.94 8.00 7.40 7.24 6.74 6.21 5.88 5.66 6.74

a) (8) Compute the median and mode number of unemployed workers

b) (2) Is there a mode?

c) (6) Compute the standard deviation of the number of unemployed workers.

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