Answer: This is a "CONTROLLED PLACEBO EXPERIMENT".
Explanation: A controlled placebo experiment is a type of research method that is used to check the effectiveness of a drug in a patient. This is done by selecting a sample group, then randomly divide the two group into a placebo group ( this are the group that will receive the drug treatment ) and the controlled group( these are the group that will receive a coloured mixture that looks like the drug, but does not have any effect). Without the groups knowledge about the real drugs and the coloured mixture, but are followed up and tested.
This is a controlled placebo experiment, because 400 student has been choosed as the sample, and are divided into a placebo group and a controlled group, to check the effectiveness of a drug on their memory.
Answer:
All states must accept the laws and records of other states as valid.
Explanation:
Section 1 said that when a state sanction a public act, record or judicial proceeding according to the manner in which Congress´s law prevented, these must be recognized by other states.
This was made to unify the individual states and not destroying their power.
There are very cases in which the United States Supreme Court ruled that the merits of a case in one state, must be recognized by the courts of other states.
I Hope It's Helpful
Hint The Brainliest :)
Most of the fighting was trench warfare. The eastern front was fought in central and eastern europe and was one of the main places where ww1 took place
Answer:Positive correlation
Explanation:
What Is Positive Correlation?
Positive correlation refers to a relationship that exist between two variables in such that they tend to move towards the same direction, in such that one one variable increases the other also increases and also when the other variable decreases the other one also decreases.
Statistically a great positive correlation is shown by a coefficient value of +1.0, whereas when there is no correlation that is shown by 0 and perfect inverse is shown by -1.0 coefficient. The vital thing to take note of is that this doesn't mean causation , which means it doesn't mean that the other variable is the direct cause of changes in the other variable. Positive correlation just means the two variables tend to behave the same way percentage and direction wise. For example this can be seen when teh price of the product is changed like when the demand increases the price also rises.
When people increase their food intake their weight scores tend to increase and when they decrease their food intake their weight scores tend to decrease however we know there are so many things that can increase weight gain not food itself but these two tends to move towards the same direction and percentage.
