Do a particular subject's response latencies (RL) in a reaction-time experiment cluster around a single point or do they vary widely? To answer this question, a researcher performs descriptive statistics on RL. 

Perform descriptive statistics on the data located in "j:\ling\msdos\otherdata\dsstudy.txt."

Data file: dsstudy.sav
Variables: TRIAL, RL

TRIAL    RL
1       27000
2       18750
3       12000
4       13200
5       21000
(data continue in dsstudy2.txt) 

Answer the following questions:

1. What kind of data are in the two variables (nominal, ordinal, or interval)?
   
    
    
2. Provide figures to indicate the central tendency of the RL data.
   
    
    
3. Provide figures to indicate the dispersion of the RL data:
   
    
    
4. Approximately 96% of the response times will fall within two standard deviations of the mean.
   a. For the subject above, state the times where these scores will fall. 
   b. What crucial assumption about the distribution of the data does this calculation require?
    
   
   
    
5. Do the RL data have any problems with kurtosis or skewness? If so, explain with data.