Introduction. The standard deviation is a measure of the spread of scores within a set of data. Usually, we are interested in the standard deviation of a population. However, as we are often presented with data from a sample only, we can estimate the population standard deviation from a sample standard deviation.ntroduction. The standard deviation is a measure of the spread of scores within a set of data. Usually, we are interested in the standard deviation of a population. However, as we are often presented with data from a sample only, we can estimate the population standard deviation from a sample standard deviation.
Itching usually results from dry skin, a skin disorder, or an allergic reaction. If the person has no rash or skin abnormalities, the cause may be a drug, an allergic reaction that has internal effects, or a systemic disorder.
Quick Fact. While a rash can appear anywhere on the body, rashes due to severely dry skin caused by menopause tend to pop up on the forehead, nose, back, neck, chest, arms, or legs. To understand the link between itchy skin rashes and menopause, you need to know about estrogen.Estrogen is the hormone that stimulates the formation of skin-smoothing collagen and oils. That's why, as menopause approaches and estrogen production diminishes, dry, itchy skin and rashes become very common.hile a rash can appear anywhere on the body, rashes due to severely dry skin caused by menopause tend to pop up on the forehead, nose, back, neck, chest, arms, or legs.