Table 1 Trends in the use of t-tests and non-parametric tests in the NEJM
From: t-tests, non-parametric tests, and large studies—a paradox of statistical practice?
Statistical procedure | 1978–1979 | 1989 | 2004–2005 |
|---|---|---|---|
t-tests∗ | 44% | 39% | 26% |
Non-parametric tests‡ | 11% | 21% | 27% |