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Aleksandr [31]
3 years ago
9

Why is it necessary for every experiment to include a control group

Biology
2 answers:
Radda [10]3 years ago
4 0

A control group is important for an experiment because it allows the experiment to minimize the changes in all other variables except the one being tested.

Leya [2.2K]3 years ago
4 0

So that you can tell what is changing in the experimental group vs the control group.

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Region of the World                             Percentage    Value in Metric tons
North America                                          17                  23,332,500
Asia                                                          52                  71,370,000
Africa                                                          3                    4,117,500
Europe                                                     18                  24,705,000
Latin America and the Caribbean              8                  10,980,000
Oceania                                                  <u>   2</u>                <u>    2,745,000</u>
                                                               100                137,250,000

We multiply the 137.25 million metric tons by its percentage to get its equivalent value in metric tons.

Asia uses 71.37 million metric tons.

In making the bar graph, The vertical line will be the percentage and the horizontal line will be the region. Bars of each region should have different colors for easy identification. Spaces between bars should be present, so that the bar graph will not be confused with the histogram.
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