Researchers conducted a study to determine the monthly rental
cost of rent-controlled apartments in the five boroughs of New York
City in 2012. The study randomly sampled 157 apartment records from
the Bronx, obtained from a large collection of income- and
expense-filing statements. The 95% confidence interval of
rent-controlled apartment costs in the Bronx was $917.00 Â± $22.10.
The cost of all rent-controlled apartments in the Bronx has a
standard deviation of $73.70.