The third one
not the first or the second one
In every experiment, there are experimental unit. The experimental units in this experiment is the students in the four classes.
- The experimental unit is referred to as the person, animal, or object that is the subject of the experiment.
The Experimental units is known to often receive different treatments from one another in an experiment.
The experimental method used often has a lot of manipulation of variables so as to establish cause and effect relationships. The unit is the object to which the treatment is randomly given to. If the experimental units are human beings, they are referred to as subjects.
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Answer:
By 4 weeks, your baby will respond to your smile, perhaps with a facial expression or a movement. By 3 months, they will smile back at you. By 4 to 6 months, they will turn to you and expect you to respond when upset.
Explanation:
sorry but here is not option so I try my best to give answer
<span>forced labor of Incas in Spanish mines (I just took this test lol)</span>
Answer:
The crusades created standardized methods of taxation and increased European trade.
