A recent study of health service costs for coronary angioplasty versus coronary artery bypass surgery at a London hospital showed an average cost of 6,176 with a standard deviation of 329 for 231 angioplasties and an average cost of 8164 with a standard deviation of 264 for 221 bypass surgeries. Is this sufficient evidence to say that the average cost of angioplasty is less than the average cost of bypass surgery?
- P > .10, so there is little evidence that angioplasty costs less.
- P is between .05 and .10, so there is some evidence that angioplasty costs less.
- P is between .001 and .01, so this is strong evidence that angioplasty costs less.
- P < .001, so this is very strong evidence that angioplasty costs less.
- P is between .01 and .05, so this is moderate evidence that angioplasty costs less.