Refer to Example 10 on whether arthroscopic surgery is better than placebo. The following table shows the

Question:

Refer to Example 10 on whether arthroscopic surgery is better than placebo. The following table shows the pain scores one year after surgery. Using software (such as MINITAB) that can conduct analyses using summary statistics, compare the placebo to the debridement group using a 95% confidence interval. Use the method that assumes equal population standard deviations. Explain how to interpret the interval found using software.