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3. This will lead to a biased sample because the type of students who take Psychology and Law may be different from the type of students who take Introduction to Neuroscience
Explanation:
Professor Kramer wants to measure the level of happiness of his students, and he wants to do so for both his classes. However, he will biased the survey simply because he is considering surveying only the students from one of his classes, who may be very different from the students from the other class.
If Professor Kramer wants to make a unbiased survey, he should either find a way to also apply the survey to the students from the other class, or change the goal of the research to measuring the happiness level of the Psychology and Law class students only.
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Fueled by the game-changing use of steam power, the Industrial Revolution began in Britain and spread to the rest of the world, including the United States, by the 1830s and ‘40s. Modern historians often refer to this period as the First Industrial Revolution, to set it apart from a second period of industrialization that took place from the late 19th to early 20th centuries and saw rapid advances in the steel, electric and automobile industries.
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I'm sorry I don't understand
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