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.
William Dunbar died in The Forest on October 16, 1810. Scientific achievements. William Dunbar was known for his engineering and scientific talents, which he employed in plantation work. He invented a screw press and introduced the square baling of cotton, and was the first to suggest the manufacture of cottonseed oil.