Calculate the Sample Standard Deviation. 1  Calculate the mean or average of each data set. To do this, add up all the numbers in a data set and divide by the total number of pieces of data. For example, if you have found numbers in a data set, divide the sum by 4. This is the mean of the data set.
investor. A person who buys an asset with the expectation that its market value will increase and yield a profit when sold. A person whose investment strategy focuses on the long-term, rather than speculation about short-term market movements. Compare to Daytrader; scalper. person who buys an asset with the expectation that its market value will increase and yield a profit when sold. A person whose investment strategy focuses on the long-term, rather than speculation about short-term market movements.
Definition of invest. 1  transitive verb. 2  1 : to commit (money) in order to earn a financial return. 3  2 : to make use of for future benefits or advantages invested her time wisely. 4  3 : to involve or engage especially emotionally were deeply invested in their children's lives. 5  intransitive verb. : 6  to make an investment.