Following head and/or neck trauma, patients are suggested for long-term physical therapy. An observational study is conducted to assess whether there is the significant difference in the mean numbers of physical therapy sessions attended by male and female patients suffering head and/or neck trauma.
Gender #of patients Mean # of Physical Therapy Sessions Attended Standard Deviation
Male 20 14.6 6.3
Female 15 18.1 5.9
a. Construct a 95% confidence interval for the difference in mean numbers of physical therapy sessions attended between male and female patients suffering head and/or neck trauma
b. Based on (a), is there a significant difference in the mean numbers of physical therapy sessions attended between male and female patients? justify your answer briefly?