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]