By convention, specific symbols represent certain sample statistics. For example, 1  x refers to a sample mean. 2  s refers to the standard deviation of a sample. 3  s 2 refers to the variance of a sample. 4  p refers to the proportion of sample elements that have a particular attribute.
As the name implies, lubricant laxatives make stools slippery. The mineral oil within these products adds a slick layer to the intestine's walls and stops the stool from drying out. Though highly effective, lubricant laxatives are best used as a short-term cure for constipation. Over a longer period, mineral oil can absorb fat-soluble vitamins from the intestine, and decrease certain prescription drugs from being fully absorbed into the body.
Uses. Castor oil is used to treat constipation. It may also be used to clean out the intestines before a bowel examination/surgery. Castor oil is known as a stimulant laxative.It works by increasing the movement of the intestines, helping the stool to come out.astor oil is used to treat constipation. It may also be used to clean out the intestines before a bowel examination/surgery.