The number of students absent in a school was recorded every day for 147 days and the raw data was presented in the form of the following frequency table. No. of Student absent: 5        6          7      8      9        10      11          12    13    15      18      20 No. of days 1      5        11      14          16    13    10      70      4          1      1      1 Obtain the median and describe what information it conveys.