1. Describe the effect of each treatment regimen on changes in heart rate and blood pressure. Does the distribution of changes in these parameters look normal or not?
2. Compare graphically the effects of the treatment regimens on heart rate and blood pressure. Do you notice any difference between treatments?

Table 5.3: Format of NIFED.DAT

Variable ____________________________ Code
ID ..........................................................................
Treatment group ..................... N = nifedipine/
................................................... P = propanolol
Baseline heart rate^a ....................... beats/min
Level 1 heart rate^b ......................... beats/min
Level 2 heart rate ........................... beats/min
Level 3 heart rate ........................... beats/min
Baseline SBPa ..................................... mm Hg
Level 1 SBPb ....................................... mm Hg
Level 2 SBP ......................................... mm Hg
Level 3 SBP ......................................... mm Hg

^aHeart rate and SBP immediately before randomization.
^bHighest heart rate and SBP at each level of therapy.
Missing values indicate one of the following:
(1) The patient withdrew from the study before entering this level of therapy.
(2) The patient achieved pain relief before reaching this level of therapy.
(3) The patient encountered this level of therapy, but this particular piece of Data set available data was missing.