If treatment A is superior to treatment B in certain respects (with a

1.	If treatment A is superior to treatment B in certain respects (with a P value less than 0.01) it can be concluded that A. A given patient’s chances of improvement by treatment A are 99 per cent. B. The likelihood that the observed difference between treatments A and B is due to chance is less than 1 per cent. C. The observed superiority is statistically significant. D. At least 100 patients were studied. E. Treatment A should now be substituted for treatment B.
Answer» A. False This cannot be concluded from the results given. B. True This is the meaning of P less than 0.01. C. True Conventionally P must then be less than 0.05. D. False This cannot be concluded from the results given. E. False Adverse effects may outweigh the benefit shown.

If treatment A is superior to treatment B in certain respects (with a P value less than 0.01) it can be concluded that A. A given patient’s chances of improvement by treatment A are 99 per cent. B. The likelihood that the observed difference between treatments A and B is due to chance is less than 1 per cent. C. The observed superiority is statistically significant. D. At least 100 patients were studied. E. Treatment A should now be substituted for treatment B.

Answer»

A. False This cannot be concluded from the results given.

B. True This is the meaning of P less than 0.01.

C. True Conventionally P must then be less than 0.05.

D. False This cannot be concluded from the results given.

E. False Adverse effects may outweigh the benefit shown.

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