The common symptoms of an overactive thyroid are weight loss, increased appetite, irritability, rapid heart rate and anxiety, according to the Office on Women's Health, whereas underactive thyroid symptoms include weight gain, cold sensitivity, fatigue, depression and muscle weakness.
Z-Scores Explained. A z-score is a score that falls somewhere within the standard normal distribution. Its counterpart on the standard distribution is the standard score. The standard normal distribution and z-score allow all the standardized scores to be weighed equally through a few calculations. z-score is a score that falls somewhere within the standard normal distribution. Its counterpart on the standard distribution is the standard score. The standard normal distribution and z-score allow all the standardized scores to be weighed equally through a few calculations.
The scores are typically described in Standard Scores. Standard Scores have a mean (average) of 100. Anything within 10 points from 100 is considered Average. Scores from about 90-110 are considered average.hree percent of the population will fall in this range. On the other end three percent of the population is estimated to fall in the gifted or Superior range (130 and above). Scores between 120-129 are considered Above Average.