Description Usage Arguments References Examples
Use Wan et al.'s methods (Wan et al., 2014) to estimate the sample standard deviation based on sample quantiles derived summaries for a single study.
1 
X 
a vector of ordered summary statistics 
n 
the sample size 
type 
a character string indicating which type of summary statistics is reported. The options for the type argument are:

Wan X,Wang W, Liu J, and Tong T. (2014). Estimating the sample mean and standard deviation from the sample size, median, range and/or interquartile range. BMC Medical Research Methodology, 14:135.
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