Computes an upper confidence limit for a population variance using an
estimated variance from a sample of size n in a prior study. The upper limit
can be used as a variance planning value in sample size functions for
desired power that require a planning value of the population variance.
For more details, see Section 1.31 of Bonett (2021, Volume 1)
Usage
ci.var.upper(alpha, var, n)
Arguments
- alpha
alpha value for 1-alpha confidence (one-sided)
- var
estimated variance
- n
sample size
Value
Returns an upper limit (UL) variance planning value
References
Bonett DG (2021).
Statistical Methods for Psychologists https://dgbonett.sites.ucsc.edu/.
Examples
ci.var.upper(.10, 1.45, 100)
#> UL
#> 1.762447
# Should return:
# UL
# 1.762447