<span>In randomized controlled trials, people are randomly assigned to each category to offset any potential bias.
</span>Selection bias<span> is the phenomenon where</span><span> the </span>selection<span> of people or groups is not adequately randomized to offset potential bias in research studies. This in turn does not ensure that the study samples included in research are representative of the population needed to be tested on.</span>
Development in technology and sociological changes had an effect on early rock music.
- It should be noted that time has an effect on music and current events happening are often mixed into music so that people can be able to relate to it.
- The development in technology was vital as it helped artists in making better quality music and enabled them to market their music to bigger audiences. By making better music and spreading it around the world, helped in introducing the people to new music styles and ideas.
In conclusion, some of the sociological changes were new styles of R&B music, artists such as Elvis Presley. The changes led to different perspectives on issues.
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Fewer competitors of the global economy
<em>Paris is 7 hours behind China.</em>
<em>So if it is 7:00 am in China then in Paris, 7:00 - 7 = 0:00 = 12:00 am midnight</em>
<em>it would 12 am midnight in Paris.</em>
The usage of mass media is not part of any formal processes that the president undertakes, such as issuing executive orders. Instead, the importance of the mass media is to inform the public and to convince the public of the necessity of certain policies.
Therefore the correct answer is:
B.The president uses mass media to gain support for policies.
