Steps for test of significance

• A test of significance can only be done on a
  difference, e.g. difference betw and , 1 and 2

1. Decide the difference to be tested, e.g. difference
   in pulse rate betw those who were subjected to a
   stress test and the controls, on the assumption
   that the stress test significantly increases pulse
   rate (the hypothesis)


2. Formulate a Null Hypothesis, e.g. no difference in
   pulse rate betw the two groups,
   
   
   • i.e. H0: test=control
   
   
   • Alternative hypothesis H1 : test  control
   
   
   
   

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