| getTSalpha {binseqtest} | R Documentation |
Two-sided alpha, alternative, and confidence level
Description
Two functions to find tsalpha and alternative.
Usage
getTSalpha(tsalpha = NULL, alternative = NULL, conf.level = NULL)
getAlternative(tsalpha)
Arguments
tsalpha |
vector of length 2 with nominal significance levels for each side, if not NULL overrides |
conf.level |
confidence level, ignored if tsalpha is not NULL |
alternative |
character, alternative hypothesis, either 'less', 'greater' or 'two.sided' |
Details
The tsalpha is a vector of length 2 giving the nominal error for each side
of confidence intervals. The function getTSalpha creates a tsalpha vector, allowing its creation either directly (non-null input for the argument tsalpha
simply outputs that same argument), or through the alternative and conf.level arguments.
The element tsalpha[1] is the nominal error on the lower side, so for example if tsalpha=NULL, alternative='greater', andconf.level=.95,
then getTSalpha outputs the vector c(0.05,0). In other words, if on rejection you want to conclude that \theta>\theta_0, then you want all the nominal
error to be on the lower side. Similarly tsalpha[2] is the nominal error on the upper side, and tsalpha=NULL, alternative='less', andconf.level=.95,
gives c(0,0.05). If tsalpha=NULL, alternative='greater', and conf.level=.95, then outputs the vector c(0.025,0.025).
You must supply either tsalpha or both alternative and conf.level.
Value
getTSalpha returns a tsalpha vector (see details), and getAlternative gives the character vector for the appropriate alternative.
Examples
getTSalpha(conf.level=.95,alternative="two.sided")
getAlternative(c(0,.025))