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marin [14]
2 years ago
5

Most states in the u.s. ban the use of polygraph ("lie-detector") in their justice systems. false positives (where an individual

fails even though he or she is telling the truth) are relatively common and make up about 15% of all test results. (a) if 8 random people take a polygraph test, what is the probability that none of the results are false positive?
Social Studies
1 answer:
xeze [42]2 years ago
3 0

The problem states that 15% of the result are false positive, but it asks about for results that are not false positive, so we should focus on 85% or .85 to express it as a probability value. Then the problem ask about 8 random people taking the test, since it is not mentioned that the results of the test are connected in some way we can assume that they are independent. In that case we can solve it by .85^8, which is .27. The result is 27% of probability

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How were Egypt and Nubia's empires different
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There were not many differences between Egypt and Nubia, but the ones that existed were significant enough to constitute their authority as separate ancient states. The Nile River, the lifeblood of the two civilizations and their founding site, had great impact on both societies through their use of it for irrigation and transportation. Despite the difference in availability of information and written records between the two civilizations, scholars today are still able to infer, and sometimes figure out, what the differences between the societies were based off recovered artifacts. Egypt had many more written records than Nubia, probably because Egypt adopted hieroglyphic writing about 3200 BCE, and Nubia adopted their own writing system of Meroitic about 500 BC, though this Meroitic writing still is not understandable by scholars. The differences, nonetheless, were visible and pronounced in each society, and led to different economic, social, and political standards and cultural practices in each state.
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The next aspect of Nubian and Egyptian difference, despite their abundant similarities, was their social and political organization. At the bottom of the social hierarchy came peasants and slaves; these supplied the hard labor for the agricultural societies of Egypt and Nubia. Next came the governmental and military workers. Egypt was organized into a complex bureaucracy that gave positions of power based on merit, not birth. This gave more people of common birth a chance to advance in society, a feature very different from most ancient societies. Almost immediately after the peasants and government workers came the rulers, or ruler in Egypt’s case. The Egyptian leader, the pharaoh, was theoretically an absolute leader, which did not give much room for a class of nobles as in other ancient societies. The pharaohs built giant tombs for themselves called pyramids, which still stand today as testament to their power. Meanwhile, Nubia was organized into a kingdom, which meant the ruling class was made up of a king and his nobles who supervised the lower classes. Nubia’s social organization was resemblant of Mesopotamia’s, despite the fact that it was farther away than Egypt. Nubian rulers did not build giant pyramids, but still organized lavish smaller pyramids for themselves with riches stored inside. Despite these differences, patriarchal societies emerged in both Egypt and Nubia. Men governed their households and their countries, with little exception, though women still had more influence in society than in Mesopotamia.
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