In their book What the Numbers Say Derrick Niederman and David Boyum say that the way to good quantitative thinking is practice, practice, practice! In this spirit I offer this post as another exercise for sharpening the reader’s numeracy skills.
A couple of months back I presented a series of statistical charts about large U.S. public library systems. Sticking with the theme of large public libraries, I thought I’d focus on one in particular, The Free Library of Philadelphia. This is because the PEW Charitable Trusts Philadelphia Research Initiative did an up-close analysis of The Free Library in 2012. So this post is a retrospective on that PEW report. Well, actually, on just this graph from the report:
Source: The Library in the City, PEW Charitable Trusts Philadelphia Research Initiative. Click to see larger image.
The PEW researchers interpreted the chart this way:
Over the last six years, a period in which library visits and circulation grew modestly, the number of computer sessions rose by 80 percent…These numbers only begin to tell the story of how the public’s demands on libraries are changing.1
The implication is that because demand for technology outgrew demand for traditional services by a factor of 8-to-1, The Free Library should get ready to plug in even more technological devices! This plan may have merit, but the evidence in the chart does not justify it. Those data tell quite a different story when you study them closely. So, let’s do that. [Read more]
1 PEW Charitable Trusts Philadelphia Research Initiative,The Library in the City: Changing Demands and a Challenging Future, 2012, p. 10.