Dr. Carefree placed unobtrusive video recording devices in the living rooms of 20 children. Later, coders (Matt, Mark, and Peter) viewed tapes of the living areas and coded how many minutes each child spent playing video games. Dr. Carefree wants to use the two most reliable coders. Whom should she pick and why?

mark and matt

Explanation:

Mark and Matt because the correlation between their ratings is high, A high correlation means there is a relationship between two variables. this is seen in the graph shown,as varables increase as the other increases(positive correlation) This therefore means that mark and matt better estimate through their code how many minutes each child played video games

answer; with few regulations protected the prices of crops which made farmers leave their farms and migrate to the big cities to work in factories;

i believe the answer is: true

our brain need to reach a certain level of development   before it could interpret and understood sound with high difficulties. to proof this, we just need to pay attention in musical preference between children and adults. it is far less likely that children would enjoy things such as orchestra or rock band as much as adults due to the difference in this ability.