| ci_to_sd | R Documentation | 
This functions allows determining the standard deviation from 95% percentage confidence intervals.
ci_to_sd(
  n,
  upper, 
  lower,
  round = 2
  )
| n | Sample size | 
| upper | Upper 95% Confidence Interval | 
| lower | Lower 95% Confidence Interval | 
| round | Rounding value for the effect size estimation | 
ci_to_sd(n = 20, lower = 0.9, upper = 1.3)
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