Certificates of deposit, or CDs, are fixed income investments that generally pay a set rate of interest over a fixed time period.
When referenced to the local common or ground, a common-mode signal appears on both lines of a two-wire cable, in-phase and with equal amplitudes. Technically, a common-mode voltage is one-half the vector sum of the voltages from each conductor of a balanced circuit to local ground or common.
So the mean for this set of numbers is 78. The mode is the number in a series that occurs most frequently (most common. Simply find the number that appears the greatest number of times in the group. For example, the mode for the following set of numbers is 21.