Multiple Sclerosis (MS) Is an Autoimmune Disease That Affects the Brain

Essay

Multiple sclerosis (MS) is an autoimmune disease that affects the brain and spinal cord.
MS affects women more than men, and is most commonly diagnosed between the ages of 20 and 40. MS sufferers typically have problems of coordination and walking. The standard care for some sufferers is a plastic device affixed to the lower leg and ankle. In a recent test of this device, volunteers with MS were timed as they walked across a room.
Times, measured without the device (ND) and with the device (D), are presented below.


-Calculate the values of these numerical summaries for the walking task without thedevice:a) The mean __________________b) The standard deviation ___________________c) The median ___________________d) The interquartile range ___________________