fsia (version 1.0)

item.stat: Item Statistics

Description

This function computes some statistics for each item.

Usage

item.stat(obj, columns)

Arguments

obj

An object of class fsdata containing the data imported by function read.formscanner.

columns

A vector containing which columns to use. Columns can be specified by name or number.

Value

A data frame with the following variables.

item

item label.

score

number of corrected responses.

count

number of total responses.

perc

percentage of corrected responses.

See Also

person.stat

Examples

data(exam1)
item.stat(obj = exam1, col = 2:31)
item.stat(obj = exam1, col = c("I1","I2"))