What if

1. If chinese were discovered the world before europeans, we would speak mandarin instead of spanish or english. Actually, mandarin would be the international language instead of english. I also think that they have a different culture that spanishs so maybe  all america would be one country. I also think that latin america would have less poor people because they would have developed really colonies through all america. Spanish only came to america to use the resources they did not develop any kind of economie there.
2. If two forms of highly intelligent life had evolved on earth, we would life in better condition.  These two forms of highly intelligent life would work together on Earth and they would put all their effort, intelligent and the best of them for better conditions, improving things that  do not have solution.
   I think that all the processes would be simples, the problems in the earth, illnesses and other things would be solved.  They would do different things to improve and ensure a better life for all.  They would use all their intelligent for it

Whales extinction

For many decades the whales have been killed. In   this graph we can see information availble since 1950 where number of blue whales killed  reached its peak and start to decreasese.While the number of blue whales decrease sudenly in 1950s , the number of  fin whales  increase in the 1950s,  reaching a peak in the 1960s and subsequently falling down abruptly.In this moment. the killing of sperm whales increase until middle of 1960s where like in the other cases after got its peak it dicreased and the killing of  new species started. the number Sei whales that reach its peak in late 60s. As you can see in the graph the killing of whales has been progressive starting from bigger whales  to smaller whales

Heading in Data Commentaries

Hi professor

Certainly, there is a different between the results of makeup exam and regular exam that different is about 14 point of Regular exam over the Makeup exam. However, as you can see in the table 16 there are three factor that can explain logically why it happens, which are date and hour , number of student , temperature of classroom.

First of all is date, the regular exam was administered on Wednesday and the makeup exam on Friday.  As student I can say that we have many responsibilities such as homework and exams every week. It could be really stressful. Even although It does not sound good , the most common strategy is work in them in a chronology way. That means the study for the test on Friday was maybe done Friday during the day. While the Wednesday test was study maybe on previous weekend.

Second is the number of the student, I think that could be the mainly reason . You can notice that on makeup exam only was applied to 25 students. While, the regular exam was applied to 125 students. That means that one or two bad grades can affect highly the average on makeup test.

Finally, The temperature in the classroom on Friday it was so hot arround 28 C. The students was complaining all the time about it , but I could not do anything to solve it .

 I think that different between the average on the two test is more that supported on these factors.

DC Metro use

In the graph  describe the movement of people in DC area. First, the number of people rise dramatic  from 6 am  until 8 am where It get its tip. At 8:am the number of people using the metro start to decline until 10. It reamins modetare until 2 pm where it rapid decline until 4. It star to increase dramatic from 4 to 6 and decrease from 6 to 8. I stay moderate from 8 to 10