Means with Pooled SD to Standardized Mean Difference
Converts raw mean scores with pooled standard deviation from the primary study to a standardized mean difference (d).
mean_to_d2(m.1, m.2, s.pooled, n.1, n.2)
m.1 |
Mean of group one. |
m.2 |
Mean of group two. |
s.pooled |
Pooled standard deviation. |
n.1 |
Sample size of group one. |
n.2 |
Sample size of group two. |
d |
Standardized mean difference (d). |
var.d |
Variance of d. |
AC Del Re & William T. Hoyt
Maintainer: AC Del Re acdelre@gmail.com
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.
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