The number of miles flown in the One year period by sample of "frequent flyers" was recorded and organized in the following frequency distribution:
Number of Miles Flown(Thousands)

Number of frequent flyers

3845

25

4552

32

5259

8

5966

12

6673

3

7380

5

 Is this a grouped or ungrouped frequency distribution?
 Find out the median number of miles flown by sample of frequent flyers.