13. A magazine advertisementclaims thatwearing a magnetized braceletwill reducearthritis pain in thosewho suffer from arthritis. A medical researchertests this claim with 233 arthritis sufferers randomly assigned to wear eithera magnetized bracelet or a placebo bracelet The researcherrecords the proportion of each group who reportrelief from arthritis pain after 6 weeks. After analyzing the data he fails to reject the null hypothesis What are valid interpretationsof his findings? A. There's insufficient evidence that the magnetized bracelets are effective at reducing arthritis pain. B. The magnetized braceletshad exactly thesame effect as the placebo at reducing arthritis pain. C. The magnetized bracelets are not effective at reducing arthritis pain. D. There were no statistically significant differences betweenthe magnetized bracelets and the placebos in reducing arthritis pain