For the data in Exercises 13–18:

  1. Find the population size .
  2. Calculate the population mean .

Question 3.18

18. The table contains the number of criminal trespass cases for the population of all police precincts in South Manhattan in 2013.

Precinct Criminal
trespasses		 Precinct Criminal
trespasses
1 108 10 207
5 105 13 135
6 113 14 340
7 233 17 74
9 219 18 120
Table 3.12: Source: New York City Police Department.