ScoreReport: Generate Score Report for Non-Binary Test Data
Description
Calculates comprehensive descriptive statistics for a test, including measures of
central tendency, variability, distribution shape, and reliability.
Usage
ScoreReport(U, na = NULL, Z = NULL, w = NULL)
Value
An object of class "exametrika" and "TestStatistics" containing:
TestLength
Number of items included in the test
SampleSize
Number of examinees (rows) in the dataset
Mean
Average score across all examinees
Median
Median score
SD
Standard deviation of test scores
Variance
Variance of test scores
Skewness
Skewness of the score distribution (measure of asymmetry)
Kurtosis
Kurtosis of the score distribution (measure of tail extremity)
Min
Minimum score obtained
Max
Maximum score obtained
Range
Difference between maximum and minimum scores
Alpha
Cronbach's alpha coefficient, a measure of internal consistency reliability
Arguments
U
Either an object of class "exametrika" or raw data. When raw data is given,
it is converted to the exametrika class with the dataFormat function.
na
Values to be treated as missing values
Z
Missing indicator matrix of type matrix or data.frame. Values of 1 indicate
observed responses, while 0 indicates missing data.
w
Item weight vector specifying the relative importance of each item
Details
This function is intended for non-binary (ordinal or rated) response data. It calculates
descriptive statistics for the overall test performance. If binary data is provided,
an error message will be displayed.