R: Six Mental Tests

Tests {sem} | R Documentation

## Six Mental Tests

### Description

These data are from the SAS manual and consist of six mental tests for 32 students, with some missing data. The three `x` variables are intended to load on a verbal factor, and the three `y` variables on a math factor. The data can be used to illustrate the estimation of a confirmatory factor analysis model by multinormal full-information maximum-likelihood in the presence of missing data.

### Usage

    Tests

### Format

A data frame with 32 observations on the following 6 variables.

`x1`

  score on verbal test 1.

`x2`

  score on verbal test 2.

`x3`

  score on verbal test 3.

`y1`

  score on math test 1.

`y2`

  score on math test 2.

`y3`

  score on math test 3.

### Source

Example 25.13 from SAS/STAT 9.22 User's Guide, SAS Institute, 2010.

[Package sem version 3.1-13 Index]