The mean value or score of a certain set of data is equal to the sum of all the values in the data set divided by the total number of values.A mean is the same as an average.ean. The mean value or score of a certain set of data is equal to the sum of all the values in the data set divided by the total number of values. A mean is the same as an average.
A: Between 1763 and 1775, James Watt invented a steam engine with an efficiency much greater than that of the other steam engines then in use. This new steam engine helped to power the Industrial Revolution.
Watt had become interested in the design of steam engines about the time he formed his business partnership with Craig, but did not have the time or the inclination to pursue his research. In 1763, however, the Professor of Natural Philosophy John Anderson presented him with a model Newcomen steam engine in need of repair.