See original article: Mohammed et al. 17 (2): 137.

Update to Mohammed et al. 17 (2): 137
Qual Saf Health Care 18:80 doi:10.1136/qshc.2008.012047corr1
  • Correction


Mohammed MA, Worthington P, Woodall WH. Plotting basic control charts: tutorial notes for healthcare practitioners Qual Saf Health Care 2008;17:137–45. An error has occurred in the appendix for this paper: In the row ‘Continuous data (x) of which there are n items’ and the column ‘Three-sigma control limits’, 2.26 should be 2.66.

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