In the 2010 U.S. Census, one of the questions asked was “How…

In the 2010 U.S. Census, one of the questions asked was “How many people live in your household?”. The table below shows the probability distribution of this variable, X, which have values 1, 2, 3, 4, 5, 6, or 7.  X (Number of People) 1 2 3 4 5 6 7 P(X = x) ??? 0.336 0.158 0.137 0.063 0.024 0.015 What is the expected value for X?