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.
1 The heat can break down your skinâs elasticity and natural collagen, which over time can cause your skin to sag. 2  So for younger looking skin, keep your use of the sauna and steam room to a minimum. 3  Constantly Cranking up the AC. If you eat a lot of salty snacks, you may have dehydrated skin. 2  Excessive sodium in your diet can suck the moisture out of your skin and make it appear dull. 3  To avoid this, cut back on salty treats and use a hydrating facial moisturizer. 4  Poor Vision & Squinting.