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.
1769 James Watt improves the steam engine. James Watt from Scotland designs a more efficient steam engine. One of the most important inventions of the Industrial Revolution, steam engines power the first trains, steamboats, and factories.1794 Eli Whitney patents the cotton gin. Eli Whitney creates a machine that makes it much easier to separate cotton seeds from cotton fiber.769 James Watt improves the steam engine. James Watt from Scotland designs a more efficient steam engine. One of the most important inventions of the Industrial Revolution, steam engines power the first trains, steamboats, and factories.