Standard Deviation. Standard deviation is a statistical measurement of the variation in a set of data. Standard deviation indicates how much the values of a certain data set differ from the mean on average.tandard deviation is a statistical measurement of the variation in a set of data. Standard deviation indicates how much the values of a certain data set differ from the mean on average.
* Post-nasal drainage, such as with a sinus infection (sinusitis) or allergies. Rarely, a salty taste in the mouth is due to a nutritional deficiency, endocrine disorder or neurological disorder, such as epilepsy or migraine. Treatment is directed at the underlying cause, if possible.
Oily taste in mouth can be due to either eating oily and spicy food, it can be due to gastrointestinal reflux, or improper functioning of the liver. The other causes may include improper oral hygiene, bad dentures, drinking alcohol, smoking tobacco, thick coating on the tongue. Correcting these minor causes can decrease bad taste in the mouth.