Researchers at the Mayo Clinic have stucked the effect of sound levels on patient healing and have found a significant association (louder hospital ambient sound level is associated with slower postsurgical healing). Based on the Mayo Clinic's experience, Ardmore Hospite Installed a new vinyl flooring that is supposed to reduce the mean sound level (decibels) In the hospital corridors. The sound evel is measured at five randomly selected times in the main corridor. New Flooring Old Flooring 37 53 38 45 45 48 30 58 Click here for the Excel Data File (8-1) Does the evidence convince you that the mean sound level has been reduced? Select the appropriate hypotheses. CHOP - M2 SOVE M:, - H2=0 Ob (8-2) At a - .05, what Is the decision rule? Assume equal variances. 5. Reject the null hypothesis If Traje > -186 (8 d.f) b. Reject the null hypothesis If take .1042. (dif., - 4, of, - 4.) b. Reject Me If Franc > 9.60 or Franc <.1042. of2 what is the test statistic: statistic value to decimal places. at has variance changed do not reject my been>