Answer:
Because when they were passing goods from India to Egypt the prices were raised. Ghengis khan and his mongol armies rose to power at the end of the twelfth century, at the moment wgen few opposinf rulers could put up much resistance to them. The vast mongol empire he created stretched from China to Europe, across which the silks routes functioned as efficient lines of communication as well as trade.
Explanation:
Answer:
The conclusion is false, because it is assuming that correlation = causation.
Explanation:
An important principle in statistical analysis is the principle that when correlation exist between two variables or more, it does not mean that one of the variables are causing the other to appear in a certain manner.
Remember that correlation means that you are investigating whether a relationships exists between two variables; in this example, as we can see, it is between the biodiversity in an ecosystem and the population of an insect.
The graph can be said to illustrate the result of the research; that as the biodiversity of the ecosystem goes down, the insect's population goes up. This is a form of negative correlation.
However - we do not know what is the direction of the relationship; the student concludes that as some insects die within the ecosystem, the researched insect's population goes up; assuming that the predator species died off and thus the researched insect's population increases.
Yet, it is also possible for the relationship to go towards the other direction; the researched insect population increases - perhaps by the introduction of a new food source that causes the species' population to increase - and thus, this damages the biodiversity of the ecosystem, making the population go down since it is possible that the researched insect is instead the species which is on top of the food chain at that ecosystem.
To investigate the direction of a relationship, further research need to be done and more sophisticated statistical methods need to be used.
I would say you do considering that unless you own the river or lake or such, the fish and body of water belongs to the state or county
Answer:
life expectancy at birth, educational attainment
