| se.meanratio2 {vcmeta} | R Documentation |
Computes the standard error for a 2-group log mean ratio
Description
This function computes the standard error of a 2-group log mean ratio using the estimated means, estimated standard deviations, and sample sizes. The log mean estimate and standard error output from this function can be used as input in the meta.ave.gen, meta.lc.gen, and meta.lm.gen functions in application where compatible mean ratios from a combination of 2-group and paired-samples experiments are used in the meta-analysis. Equality of variances is not assumed.
Usage
se.meanratio2(m1, m2, sd1, sd2, n1, n2)
Arguments
m1 |
estimated mean for group 1 |
m2 |
estimated mean for group 2 |
sd1 |
estimated standard deviation for group 1 |
sd2 |
estimated standard deviation for group 2 |
n1 |
sample size for group 1 |
n2 |
sample size for group 2 |
Value
Returns a one-row matrix:
Estimate - estimated log mean ratio
SE - standard error
References
Bonett DG, Price RM (2020). “Confidence intervals for ratios of means and medians.” Journal of Educational and Behavioral Statistics, 45(6), 750–770. ISSN 1076-9986, doi:10.3102/1076998620934125.
Examples
se.meanratio2(21.9, 16.1, 3.82, 3.21, 40, 40)
# Should return:
# Estimate SE
# Log mean ratio: 0.3076674 0.041886