A study was conducted to determine if patients recovering from knee surgery should receive physical therapy two or three times per week.Suppose represents the proportion of patients who showed improvement after one month of therapy three times a week and represents the proportion of patients who showed improvement after one month of therapy twice a week.A 90% confidence interval for is Give an interpretation of this confidence interval.
A)We are 90% confident,based on the data,that the proportion of patients who show improvement with therapy three times per week is between 15% and 39% lower than the proportion who show improvement with therapy twice a week.
B)We are 90% confident,based on the data,that the proportion of patients who show improvement with therapy three times per week is between 15% and 39% higher than the proportion who show improvement with therapy twice a week.
C)We know that 90% of all knee-surgery patients will show between 15% and 39% more improvement with therapy three times per week instead of twice a week.
D)We know that 90% of all knee-surgery patients will show between 15% and 39% more improvement with therapy twice a week instead of three times per week.
E)We are 90% confident,based on the data,that patients who receive therapy three times per week show between 15% and 39% more improvement after one month than patients who receive therapy twice a week.