Exploratory data analysis is an attitude, a state of flexibility, a willingness to look for those things that we believe are not there, as well as the things we believe might be there. John Tukey, as quoted in “Nonparametric statistical data modeling: comment.” J Am Stat Assoc 1979, 74, 121-122.
“The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from some data.” John Tukey, as quoted in “Sunset Salvo.” The American Statistician 1986, 40(1), 72-76.
“In a world where the price of calculation continues to decrease rapidly, but the price of theorem proving continues to hold steady or increase, elementary economics indicates that we ought to spend a larger and larger fraction of our time on calculation.” John Tukey, as quoted in “Sunset Salvo”, The American Statistician 1986; 40(10): 72-76.
“Without data, you’re just another person with an opinion.” W. Edwards Deming. As quoted at https://www.goodreads.com/author/quotes/310261.W_Edwards_Deming.
Referring to anecdotal data: “That’s not an experiment you have there, that’s an experience.” Sir Ronald A. Fisher.
…when people assume that the Excel output is enough. I think of all the research papers in economics where the authors must have spent dozens of hours trying all sorts of different model specifications, dozens of hours writing and rewriting the prose of the article, . . . and 15 minutes making the graphs.” Andrew Gelman, quoted at http://andrewgelman.com/2009/04/22/more_on_data_vi/.