ci.agree {statpsych}

Confidence interval for a G-index of agreement

Description

Computes a confidence interval for a G-index of agreement between two polychotomous ratings. This function requires the number of objects that were given the same rating by both raters.

Usage

ci.agree(alpha, n, f, k)

Arguments

alpha

alpha level for 1-alpha confidence

n

sample size

f

number of objects rated in agreement

k

number of rating categories

Value

Returns a 1-row matrix. The columns are:

• Estimate - maximum likelihood estimate of G-index

• SE - standard error

• LL - lower limit of the confidence interval

• UL - upper limit of the confidence interval

References

Bonett DG (2022). “Statistical inference for G-indices of agreement.” Journal of Educational and Behavioral Statistics, 47(4), 438–458. ISSN 1076-9986, doi:10.3102/10769986221088561.

Examples

ci.agree(.05, 100, 80, 4)

# Should return:
#  Estimate         SE        LL        UL
# 0.7333333 0.05333333 0.6132949 0.8226025