The countries and territories in purple on the map have net average monthly salary purple â in excess of â¬4,000, blue â in the range of â¬1,500 â â¬3,999, orange â â¬500 to â¬1,499, in red â below â¬500.
The main weakness of the Panther tank was its much thinner (40-50 mm thick) side armour. The thinner side armour was necessary to keep the tank's overall weight within reasonable bounds, but it made the Panther vulnerable to attacks from the side by most Allied and Soviet tank and anti-tank guns.
The weakness in the experimental design was that they failed to take into account the confounding variables, and did not try to eliminate or control any other factors. For example, it is quite possible that the heaviest drinkers hailed from a different background or social group.