Don 't worry about polls, but if you do, don't admit it. is a quote by former First Lady Eleanor Rosalynn Smith Carter (1927 - ).
Theory is a good thing, but a good experiment is forever. is a quote by Russian nobel prize winning physicist Pyotr Leonidovich Kapitsa (1894 - 1984). The quote is found on page 160 of "Experiment, theory, practice, articles and addresses volume 46."
...experiment without mathematics will neither sufficiently discipline the mind or sufficiently extend our knowledge... is a quote by Scottish geophysicist Balfour Stewart (1828 - 1887). The quote is found in a letter from Stewart to Henry Roscoe of Owens College on June 2, 1870.
The only relevant test of the validity of a hypothesis is comparison of prediction with experience. is a quote of American economist and statistician Milton Friedman (1912 - 2006). The quote can be found in the chapter "The methodology of positive economics" written by Dr. Friedman as an original article in his 1953 book "Essays in Positive Economics" containing a collection of his earlier articles.
This issue contains articles about Karl Pearson (150 years after his birth); finding more ways to make learning statistics fun; simulating capture-recapture sampling in Excel and by hand; common misconceptions in statistics; a correlation-based puzzler and a STAT.DOKU puzzle.