Experimental group confound group.
I believe That statement is false
Average means that your test results is pretty much similar/ on the same level with other subjects.
It does not necessarily mean normal because the test subjects could be taken based on certain abnormalities that they possess.
<span>a. natural monopoly
</span><span>A common example of a natural monopoly is electricity service. To provide it, workers must build power stations and power lines. The company must connect each customer's home or business to the system of lines and stations. The costs are very high. If more than one company offered electrical service to an area, that means more power stations and lines that would cross each other. It is more efficient, safer, and less costly to allow one company to control the electricity service to an area. With more customers on the same power grid, or system of electricity flow and equipment, the costs are spread out more and so prices are lower.</span>
55 percent of Americans will marry at least once
