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.
James Watt in his workshop. At Glasgow University, James Watt became friends with Adam Smith, who founded the academic discipline of Economics and wrote The Wealth of Nations. He also became friends with the chemist Joseph Black, who discovered magnesium and, independently of Watt, invented the concept of latent heat. In 1759, four years after his arrival in Glasgow, the 23 year-old James Watt became interested in steam engines.