Metastatic melanoma (MM) is a type of skin cancer. It is caused by a faulty receptor protein in cell-surface membranes. There have been no very effective treatments for this cancer.
The total number of patients in the investigation was 502. The table below shows the doctors' results.
TreatmentMedian survival time (ST) / months Percentage of patients showing significant reduction in tumours
Dacarbazine9.1 10.3
Dacarbazine and ipilimumab11.2 15.2
The doctors compared median survival times for patients in each group.
How would you find the median survival time for a group of patients?
The total number of patients in the investigation was 502. The table below shows the doctors' results.
Treatment | Median survival time (ST) / months | Percentage of patients showing significant reduction in tumours |
Dacarbazine | 9.1 | 10.3 |
Dacarbazine and ipilimumab | 11.2 | 15.2 |