image Frauds in Brooklyn in 2013.

Table 31 provides the number of misdemeanor fraud cases in each of Brooklyn's 23 police precincts in 2013. Use this data for Exercises 86–90.

Table 2.74: TABLE 31 Fraud cases in Brooklyn precincts, 2013
Precinct Frauds Precinct Frauds
60 33 75 133
61 53 76 19
62 76 77 41
63 52 78 15
66 23 79 63
67 57 81 36
68 44 83 68
69 16 84 41
70 42 88 48
71 73 90 51
72 27 94 21
73 90

Question 2.224

brooklynfrauds2013

87. Getting information from histograms. Refer to your work from Exercise 86 to answer the following questions.

  1. Find the relative frequency of precincts where 80 or more frauds occurred.
  2. Compute the proportion (relative frequency) of precincts where 40 or more frauds occurred.
  3. Compute the relative frequency of precincts that had fewer than 40 frauds. Explain how you could have used your answer from (b) to calculate this.

2.2.87

(a) 0.0870 (b) 0.6522 (c) 0.3478, 1 – 0.6522 = 0.3478