binest: Estimation of Group Means and SDs from Binned Count Data
Education agencies often report school or district score
distributions as the number of students scoring in each of several
score ranges, or bins, separated by threshold scores, or cuts. The
functions in the binest package translate those bin counts into
estimates of the mean and standard deviation (SD). They do so using
the heteroskedastic ordered probit (HETOP) model, which assumes that
scores follow a normal distribution within each school or district,
each of which has its own mean and SD. The binest package includes
the fast_hetop() function, which fits the model much more quickly
than previous implementations. The model is described by
Reardon, Shear, Castellano and Ho (2017)
<doi:10.3102/1076998616666279>; a Bayesian variant is described by
Lockwood, Castellano and Shear (2018)
<doi:10.3102/1076998618795124>.
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