:


 	
                     regular exercise      no regular exercise 

  sample size                    25                      25

  Average score                 132                     121
 
  SD of scores                   25                      25 


     Suppose  the null hypothesis is that regular exercise does
not help to maintain mental ability among the faculty members
aged 40 to 50, and the alternate hypothesis is that it does.  The 
 	I I   P-level of the appropriate statistical test is closest to


  
 a.  5% 

  
 b.  3% 

  
 c.  .002% 

  
 d.  .001% 
  
 
      e.  1%