ScoreReport {exametrika} | R Documentation |
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)
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 |
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.
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
Examples
# Generate score report for sample ordinal data
ScoreReport(J15S3810)
# Example with rated data
ScoreReport(J35S5000)