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.
There are at least a few different ways you can answer this question. That is because, as is the case with a lot of inventions, the first person who came up with any sort of steam engine is not the person who is most famous. The first person you can credit is Thomas Savery. He invented a crude steam engine in 1698. The next one is Thomas Newcomen. He and a partner built a steam engine in 1712 that was able to pump water up out of mines. The most famous inventor of the steam engine was James Watt.