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.
Dizziness is also called lightheadedness and describes sensations such as feeling unsteady, balance problems or the room spinning. Feeling dizzy at times is common. Different people may experience slightly different feelings of dizziness. Severe dizziness is called vertigo. A feeling of being unsteady is also called disequilibrium. If dizziness happens often, causes falls, or if you have concerns - seek medical advice. Doctors will be more concerned about a person being dizzy if they also lose consciousness or faint.