The mean numbers of days it took Chicago€™s Department of Streets & Sanitation to respond to requests to fix potholes are described by the density histogram in Fig. 18 for each of the weeks in 2012 and 2013.

a. Interpret the area of the orange region in the density histogram as a proportion.
b. Interpret the area of the orange region in the density histogram as a probability.
c. Find the probability that the mean response time for a randomly selected pothole is less than 14 days.
d. Find the probability that the mean response time for a randomly selected pothole is between 7 and 27 days, inclusive.
e. Find the probability that the mean response time for a randomly selected pothole is at least 21 days.

Transcribed Image Text:

Mean Response Time to Fix Potholes 0.05 0.04 0.03 . 0.34 0.33 0.02 0.01 07 7 14 21 28 35 42 49 56 63 70 77 Days