Now letâs see what we get when we do the math. The mean of this new data set would be the sum of the values ($690,000) divided by the number of values (11). This gives you a mean or average salary for the accounting department of $62,727.
Forget Orville Wright and his brother Wilbur. Start thinking instead of Alberto Santos Dumont, the Brazilian pioneer aviator and the man who really invented the aeroplane. That is the attitude here in Brazil, as the country prepares to celebrate the centenary tomorrow of the world's first powered flight.
The first airplane was invented in 1903 by Wilbur Wright and Orville Wright (brothers). It flew for 12 seconds ANS 2 - MANY inventors across the world invented and flew short â¦ flights in aircraft before the Wright brothers.Nobody 'discovered' the first aircraft-they were developed after much trial and many errors in the USA, France, Britain and other countries all through the late 1800's.t flew for 12 seconds ANS 2 - MANY inventors across the world invented and flew short â¦ flights in aircraft before the Wright brothers. Nobody 'discovered' the first aircraft-they were developed after much trial and many errors in the USA, France, Britain and other countries all through the late 1800's.