The first quartile (Q 1) is defined as the middle number between the smallest number and the median of the data set.The second quartile (Q 2) is the median of the data. Use the median to divide the ordered data set into two halves. 2  If the median is a datum (as opposed to being the mean of the middle two data), include the median in both halves. 3  The lower quartile value is the median of the lower half of the data.
Many people associate shaky hands with Parkinsonâs disease, but the most common cause of shaking hands is actually essential tremor. Essential tremor is the most common neurologic disorder affecting adults, but itâs not well understood.
Hand Numbness and Tingling, by David Katz, MD. Do your hands ever go numb and tingly? Do you wake up at night with a âdeadâ hand and have to shake it out to get it to âwake up?â Do your hands fall asleep while driving a car or holding a cell phone? If so, then you may have increased pressure on a nerve in your palm â a condition called Carpal Tunnel Syndrome. Carpal Tunnel Syndrome (CTS) is the most common cause of numbness and tingling in the hand. As a result of pressure on the median nerve, one may experience pain, weakness, and numbness in the hand and fingers. This typically affects some combination of the thumb, index, middle, and ring finger.