Question: A simulation analyst has gathered data for a discrete random variable, X. She finds 10 pieces of data with a value of 20, 11 pieces

A simulation analyst has gathered data for a discrete random variable, X. She finds 10 pieces of data with a value of 20, 11 pieces of data with a value of 40 and 13 pieces of data with a value of 30. The variance in this random variable must be:

(Hint: first compute the mean):

1.3733

None of the other choices.

122.2222

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