# R Dataset / Package sem / Tests

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## 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.

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Dataset imported from https://www.r-project.org.

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