Question 1

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Let X be a discrete random variable whose distribution is given by the table below.

 
0.1110.00712
7.020.0926
4.550.0142
3.320.0879
7.260.0865
5.860.159
9.320.553


(the probability that X equals a number outside of the left column is zero)

Calculate:

  1. E open parentheses X close parentheses
  2. V a r open parentheses X close parentheses
  3. P open parentheses X less than 4 close parentheses
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