Final answer:
While the study indicates statistical significance in the difference between surgery and splinting success rates for carpal tunnel syndrome, claiming surgery is definitively better is not substantiated by this single study.
Step-by-step explanation:
The statement that cannot be said is: "The result has statistical significance."
Statistical significance refers to the likelihood that the observed differences between groups are not due to random chance. In this case, the statement mentions that there is about 1 chance in 1000 of getting success rates like the ones obtained in the study if there really is no difference in success rates between surgery and splints. This suggests that the results have statistical significance.
Therefore, all other statements can be made based on the information provided:
"The better treatment for carpal tunnel syndrome is surgery." - This statement can be made based on the higher success rate (92%) for surgery compared to splinting (72%).
"The result has practical significance." - This statement can be made based on the real-world implications of the success rates observed in the study.
"The recommended treatment for carpal tunnel syndrome is splinting." - This statement can be made based on the information that surgery has a higher success rate, suggesting that it may be the preferred treatment.
So, the statement that cannot be said is: "The result has statistical significance."