#### 8.2.57.68 tblish.dataset.ToothGrowth ¶

Static Method: `out =` ToothGrowth `()` ¶

  The Effect of Vitamin C on Tooth Growth in Guinea Pigs

  #### Description ¶

  The response is the length of odontoblasts (cells responsible for tooth growth) in 60 guinea pigs. Each animal received one of three dose levels of vitamin C (0.5, 1, and 2 mg/day) by one of two delivery methods, orange juice or ascorbic acid (a form of vitamin C and coded as `VC`).

  #### Format ¶

  `supp`

    Supplement type.

  `dose`

    Dose (mg/day).

  `len`

    Tooth length.

  #### Source ¶

  C. I. Bliss (1952). The Statistics of Bioassay. Academic Press.

  #### References ¶

  McNeil, D. R. (1977). Interactive Data Analysis. New York: Wiley.

  Crampton, E. W. (1947). The growth of the odontoblast of the incisor teeth as a criterion of vitamin C intake of the guinea pig. The Journal of Nutrition, 33(5), 491–504.

  #### Examples ¶

      t = tblish.dataset.ToothGrowth;

      tblish.examples.coplot (t, "dose", "len", "supp");

      # TODO: Port Lowess smoothing to Octave