Answer:
A I think it explains it in a book called prisoner B3087
Answer:
placebo control group
Explanation:
In order to determine that a drug has any effect in the body participants of a study are divided into two groups a group which actually receives the treatment and the other group receives a fake treatment. The participants are unaware of which group they belong to.
The fake treatment group is called the placebo control group. If the drug is actually effective then the placebo control group should not shoe the same effects that the treatment group is showing.
Here, the capsule received by group 2 looks like the capsule with the Ginkgo Biloba herb. The participants of group 2 should not show an increased blood flow to the brain. The participants of group 1 should show an increased blood flow to the brain. This would prove that the Ginkgo Biloba increases blood flow to the brain.
Expressed, enumerated and delegated powers
<span>In a centrally planned economy, the government owns and operates production facilities and manages the flow of supply and demand rather than allowing interactions between businesses and consumers to determine supply and demand.
In a pure market economy the government has no role. Instead, the market makes all allocation decisions.
In a market economy, the government does not oversee the day to day micro transactions. Instead, it oversees the economy, making sure that it steps in to stabilize the market if it is going through a recession. The government is also allowed to step in and prevent trade or business with any country that it feels is a threat.
In a mixed economy, the government can create a central plan that guides the economy. The government is also allowed to own important industries, such as aerospace or banking. In some mixed economies the government handles social programs like welfare or retirement.</span>
