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.
As a boy, James Wattâs health was often poor, and much of his learning took place at home, where he could watch the fishing boats coming into the port of Greenock and the big sailing ships bringing in tobacco from the Americas. One day, thanks to his inventive mind, ships like these would be powered by engines.