Does the mean length of utterance (MLU) of a child learning English (native language) increase gradually, or does it increase in spurts? To answer this question, a researcher must establish baseline MLU measures before examining the data more carefully. 

Calculate MLUs for all of Adam's files. 

Data file:  adammlu.sav
Variables: MLU

Answer the following questions: 

1. What kind of data do Adam's MLUs represent (nominal, ordinal, or interval)?
    
   
    
2. Write the exact CLAN command you use to display Adam's MLUs.
   
    
    
    
3. Provide three statistical measures that indicate the central tendency of Adam's MLU-related development.
   
    
    
4. Provide two statistical measures that indicate the dispersion of Adam's MLU-related development.