The Real Property Association of Canada surveyed 82 office buildings as to their water usage and graphed the number of litres of water used per square foot of office space per year (L/ft²/yr) for each building (actual data, not normalized for type of building).

a) Construct a histogram of this data and identify the mode of the histogram.

b) What is implied by the fact that the median given on the diagram is lower than the mean? How does this correspond to features in your histogram?

c) By reading the numbers off the vertical axis, estimate the quartiles and identify how many buildings are outliers.

Transcribed Image Text:

350 Max = 329 300 250 200 150 Mean = 91 Median = 81 100 Min = 26 50 o 2nd Quartile o 1st Quartile o 3rd Quartile o 4th Quartile Actual Water Use Intensity (L/ft/yr)