size.ci.prop: Sample size for a proportion confidence interval
In statpsych: Statistical Methods for Psychologists
size.ci.prop R Documentation
Sample size for a proportion confidence interval
Description
Computes the sample size required to estimate a population proportion
with desired confidence interval precision. Set the proportion planning
value to .5 for a conservatively large sample size.
For more details, see Section 1.14 of Bonett (2021, Volume 3)
Usage
size.ci.prop(alpha, p, w)
Arguments
alpha
alpha level for 1-alpha confidence
p
planning value of proportion
w
desired confidence interval width
Value
Returns the required sample size
References
\insertRefBonett2021statpsych
Examples
size.ci.prop(.05, .5, .1)
# Should return:
# Sample size
# 385
statpsych documentation built on Jan. 13, 2026, 1:07 a.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
| size.ci.prop | R Documentation |
Sample size for a proportion confidence interval
Description
Computes the sample size required to estimate a population proportion with desired confidence interval precision. Set the proportion planning value to .5 for a conservatively large sample size.
For more details, see Section 1.14 of Bonett (2021, Volume 3)
Usage
size.ci.prop(alpha, p, w)
Arguments
alpha |
alpha level for 1-alpha confidence |
p |
planning value of proportion |
w |
desired confidence interval width |
Value
Returns the required sample size
References
\insertRefBonett2021statpsych
Examples
size.ci.prop(.05, .5, .1)
# Should return:
# Sample size
# 385
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Embedding an R snippet on your website
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.