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The following data represents (in thousands) the total private and public enrollment levels in grades 9 to 12 in the united staes in october 2005.

x(grade level) frequency

9 4306

10 4421

11 4490

12 4137

Construct a discrete probabilty distribution for the random variable X (hint: probability equals frequency divided by total observations) and compute the mean and standard deviation of X. (rond to 2 decimal places)

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Category:- Statistics and Probability
Reference No.:- M9998699

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