Answer:
A control should have been included in the investigation
Explanation:
It is impossible for the student to interpret a correct conclusion about his experiment, without adding a control treatment where he can really compare the differences between the variables.
Control treatment is an element of research that receives all factors, except the variable being tested. The control serves to make comparisons with the other treatments, allowing to observe the exact difference between a system where the variable was tested and the system where it was not.
In the case of the question above, it would have been necessary for the student to have placed a cart on a ramp of normal height and without sandpaper. That way he could compare the speed between this cart and the carts on the other ramps, thus having a correct result.
I don't believe so, they considered themselves Americans at that time
It has been observed that people who reside in the islands displays different customs compared to the people in some parts of the world. The reason behind this is that the people in the islands are more isolated from the changes that happened in the cities outside the island.
Answer: Classification
Explanation: In business analytics, classification is used in organizing, segmenting or grouping similar units of data into their respective classes. Classification involves data arrangement into classes based on defined attributes or characteristics, this enables easier, more efficient data management. Classification is essential in data management, segmentation, risk compliance, data security and so on. It makes data retrieval and forwarding very seamless saving a lot of time, energy, boost efficiency and drives organizational output.
