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.
Thomas Alva Edison was an American inventor, scientist and a businessman who invented the first practical bulb. He got the patent for his invention in 1879 in U. S. But records tell us that Joseph Swan, a British inventor got his invention for the same patented a year prior to Edison in Britain.he first light bulb was invented in 1809 by Sir Humphry Davy. He started working on his project in 1801. He ran electric current through two platinum rods which could not stay for long.