TestStatistics {exametrika} | R Documentation |
Simple Test Statistics
Description
Statistics regarding the total score.
Usage
TestStatistics(U, na = NULL, Z = NULL, w = NULL)
Arguments
U |
U is a data matrix of the type matrix or data.frame. |
na |
na argument specifies the numbers or characters to be treated as missing values. |
Z |
Z is a missing indicator matrix of the type matrix or data.frame |
w |
w is item weight vector |
Value
- TestLength
Length of the test. The number of items included in the test.
- SampleSize
Sample size. The number of rows in the dataset.
- Mean
Average number of correct answers.
- SEofMean
Standard error of mean
- Variance
Variance
- SD
Standard Deviation
- Skewness
Skewness
- Kurtosis
Kurtosis
- Min
Minimum score
- Max
Max score
- Range
Range of score
- Q1
First quartile. Same as the 25th percentile.
- Median
Median.Same as the 50th percentile.
- Q3
Third quartile. Same as the 75th percentile.
- IQR
Interquartile range. It is calculated by subtracting the first quartile from the third quartile.
- Stanine
see stanine
Examples
# using sample dataset
TestStatistics(J15S500)
[Package exametrika version 1.1.0 Index]