mean_to_d function

Means to Standardized Mean Difference

Means to Standardized Mean Difference

Converts raw mean scores reported in the primary study to a standardized mean difference (d).

mean_to_d(m.1, m.2, sd.1, sd.2, n.1, n.2)

Arguments

  • m.1: Mean of group one.
  • m.2: Mean of group two.
  • sd.1: Standard deviation of group one.
  • sd.2: Standard deviation of group two.
  • n.1: Sample size of group one.
  • n.2: Sample size of group two.

Returns

  • d: Standardized mean difference (d).

  • var.d: Variance of d.

Author(s)

AC Del Re & William T. Hoyt

Maintainer: AC Del Re acdelre@gmail.com

References

Borenstein (2009). Effect sizes for continuous data. In H. Cooper, L. V. Hedges, & J. C. Valentine (Eds.), The handbook of research synthesis and meta analysis (pp. 279-293). New York: Russell Sage Foundation.

See Also

d_to_g, mean_to_d2, t_to_d, f_to_d, p_to_d1, p_to_d2, ancova_to_d1, ancova_to_d2, tt.ancova_to_d, f.ancova_to_d, r_to_d, p.ancova_to_d1, p.ancova_to_d2, lor_to_d, prop_to_or, prop_to_d, r_from_chi, r_from_d, r_from_d1, r_from_t