Estimate median value for frequency distribution
The number of miles flown in a One year period by a sample of "frequent flyers" was recorded and organized into 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

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