Patients with persistent shoulder pain are often told to try shoulder surgery, but it isn't clear whether it is an effective treatment. A 2017 study randomly assigned patients with persistent shoulder pain to either actual shoulder surgery or sham surgery (incision only). Shoulder condition was assessed with the Oxford Shoulder Score (ranging from 0 for worst to 48 for best) a year later. Sample N Mean StDev SE Mean Actual 72 39. 4 9.3 1. 1 Sham 65 38. 1 9.6 1. 2 Q4.1 35 Points Obtain a 90% confidence interval estimating the difference (actual minus sham) in mean shoulder condition score one year after such interventions in the population of patients with persistent shoulder pain. When expressed in the format (lower bound, upper bound), give the numerical values rounded to 1 decimal place (for ex. 1.1, no text). Lower bound of the 90% confidence interval: Enter your answer here Upper bound of the 90% confidence interval:G4.4 15 Points What is the mathematical notation for what this interval estimates? OHactual - Maham O Idif factual-sham OHdiffactual-sham O Factual - Isham Q4.3 15 Points Enter the margin of error for this interval as a numerical value rounded to one decimal places (for ex. 1.1, no letters or text): Enter your answer hereQ4.4 35 Points What can we conclude from this confidence interval about the population of patients with persistent shoulder pain? O Shoulder condition at one year is somewhat better, on average, with surgery than with a sham. O Shoulder condition at one year is somewhat worse, on average, with surgery than with a sham. We cannot conclude based on this confidence interval because the conditions for inference are not met. O The findings are inconclusive on the relative mean shoulder condition one year after either treatment. O Shoulder condition at one year is worse, on average, with surgery than with a sham. O Shoulder condition at one year is better, on average, with surgery than with a sham