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The New York City Housing and Vacancy Survey showed a total of 59,324 rent-controlled housing units and 236,263 rent-stabilized units built in 194 or later. For these rental units, the probability distributions for the number of persons living in the unit are given.
Number of Persons Rent-Controlled Rent-Stabilized1 0.61 0.412 0.27 0.303 0.07 0.144 0.04 0.115 0.01 0.036 0.00 0.01
a. What is the expected value of the number of people living in rent-controlled units?
Rent Controlled: E(x) =
b. What is the expected value of the number of people living in rent-stabilized units?
Rent Stabilized: E(x) =
c. What is the standard deviation of the number of people living in rent-controlled units?
Var(x) =
Standard Deviation =
d. What is the standard deviation of the number of people living in rent-stabilized units?
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