2. Frequency distribution given for age of patients in Physical Therapy. (4 pts) a ) What is the class width? Age of Patients Frequency 18-27 2 28- 37 11 b) What are the class midpoints? 38 - 47 16 48 - 57 30 58 - 67 18 c) What are the class boundaries? 68-77 8 d) Use the class midpoints and frequency to find the mean, median and standard deviation for the frequency distribution. 3. The EV Range (in miles) for Plug-in Hybrid Electric Vehicles (PHEV) are given below. Complete the frequency distribution using five classes beginning with 9 and using a class width of 7. b ) Draw a graph for the data. (6 pts)