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.
Investment. Definition: An investment is a payment made to acquire the securities of other entities, with the objective of earning a return. Examples are bonds, common stock, and preferred stock.here are two ways to earn a return on an investment, which are from ongoing payments issued by the investment or through the appreciation in value of the asset. The concept can also mean the acquisition of fixed assets for internal use, also with the objective of earning a return.