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 z-score, also known as standard score, is a measurement used in statistics. It is the measurement of the number of standard deviations a specific number is above or below a mean. The formula to calculate z-score is. z = (x - Î¼) / Ï. where. 1  z is the z-score, 2  x is the value to be standardized,3  Î¼ is the mean of the given set of data, 4  Ï is the standard deviation of the given set of data.t is the measurement of the number of standard deviations a specific number is above or below a mean. The formula to calculate z-score is. z = (x - Î¼) / Ï. where. 1  z is the z-score, 2  x is the value to be standardized, 3  Î¼ is the mean of the given set of data,