Answer:
Describe what automobile use was like before the Association of Licensed Automobiles. Before 1903 cars were rare and not really taken seriously. Manufacturers of automobiles included Olds, Packard, Winton, and half a dozen other manufacturers.
The main way in which the guilds change business and employment practices is that workers formed semi-"unions," in which they were protected from certain abuses by employers. This also meant that business and employers had to pay them more money, since they could collectively bargain.
If a student wants to study the effect of sunlight on plant growth. In his experiment, 12 plants receive normal amounts of sunlight, but half of them are kept under bright sun lamps all night long. The control group is: the amount of light the plant receives.
<h3>What is control group?</h3>
A control group is a type of experiment carried out using two variables based on this control group can be defined as the process in which experiment is carried on two different variables such as dependent variables and independent variables in which one of the variables is not experimented or tested.
Based on the given scenario if after 6 weeks, the plants heights measured which inturn means that the control group is the amount of light the plant receives.
Therefore if 12 plants receive normal amounts of sunlight, but half of them are kept under bright sun lamps all night long. The control group is: the amount of light the plant receives.
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