Because thyroid disorders can cause changes in menstrual cycle and mood, the symptoms are sometimes mistaken for menopause. If a thyroid problem is suspected, a simple blood test can determine whether the true culprit is menopause or a thyroid disorder -- or a combination of the two.
In statistics, the standard score is the (signed) number of standard deviations an observation or datum is above the mean. Thus, a positive standard score indicates a datum above the mean, while a negative standard score indicates a datum below the mean.hus, a positive standard score indicates a datum above the mean, while a negative standard score indicates a datum below the mean.
The Z score is just a quantity that you compute by scaling your sample. It is also called a standard score. It is defined via the following formula: [math]Z(X):=\frac{X-E[X]}{sd(X)}[/math], where: [math]E[X][/math] is the expected value of the random variable [math]X[/math].