Based on the following post-hoc test results, what can we learn about the relationship between patient satisfaction and speciality field?

Patient Satisfaction Field N Subset for alpha = 0.05 1 2 3 Tukey HSDa,b Cardiology 24 67.46 Allergy 16 69.25 69.25 Family 60 77.53 77.53 Pediatrics 50 77.81 77.81 Internal Medicine 47 79.34 Sig. .986 .101 .985 Scheffea,b Cardiology 24 67.46 Allergy 16 69.25 69.25 Family 60 77.53 77.53 Pediatrics 50 77.81 77.81 Internal Medicine 47 79.34 Sig. .067 .079 Means for groups in homogeneous subsets are displayed. a. Uses Harmonic Mean Sample Size = 30.843. b. The group sizes are unequal. The harmonic mean of the group sizes is used. Type I error levels are not guaranteed.

a. Cardiology patients are significantly less satisfied than patients in all other specialist groups.

b. Internal medicine patients are significantly more satisfied than patients of both allergists and cardiologists, but only when the Tukey test results are used.

c. According to the results of the Scheffe test, patient satisfaction with internal medicine specialists is significantly higher than that of allergists and pediatricians.

d. There is no difference in the results of the Tukey and Scheffe post-hoc tests.