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

question 13

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 randomly assigned to two experimental groups. The volunteers in one group used the plastic device; the volunteers in the other group did not use the plastic device. Each individual was timed as he or she climbed a set of stairs. Times, measured without the device (ND) and with the device (D), are presented below.

-Using appropriate statistical terminology, compare the center, shape, and spread oftimes on the stair-climbing with and without the device.

---

Definitions:

Preferred Stock

Preferred stock is a class of stock that typically provides a fixed dividend and has precedence over common stock in the distribution of assets in the event of a company's liquidation.

Common Stock

Common Stock represents ownership shares in a corporation, providing voting rights and entitling the shareholder to a share of the company's profits through dividends.

Stock Options

Financial instruments granting the holder the right to buy or sell stock at a specified price before a certain date.