Calculus and Above

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A worldwide organization of academics claims that the mean
A worldwide organization of academics claims that the mean IQ score of its members is 115, with a standard deviation of 17. A randomly selected group of 40 members of this organization is tested, and … read more
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A population of values has a normal distribution with μ = 17
A population of values has a normal distribution with μ = 17 and σ = 71.5 . You intend to draw a random sample of size n = 236 .Find the probability that a single randomly selected value is greater th… read more
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A random sample of 375 bolts from machine A contained 41
A random sample of 375 bolts from machine A contained 41 defective bolts, while an independently chosen, random sample of 325 bolts from machine B contained 32 defective bolts. Let p1 be the proportio… read more
Sandhya_sharma
Master's Degree
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My question is similar to the question that you previously
Hello, my question is similar to the question that you previously answered except the number of hires, means and deviations are different numbers. Is there a charge for your assistance?… read more
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A worldwide organization of academics claims that the mean
A worldwide organization of academics claims that the mean IQ score of its members is 118, with a standard deviation of 15. A randomly selected group of 40 members of this organization is tested, and … read more
akch2002
Master's Degree
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I need help with a problem. Can i send you the problem. A
A worldwide organization of academics claims that the mean IQ score of its members is 112, with a standard deviation of 15 . A randomly selected group of 35 members of this organization is tested, and the results reveal that the mean IQ score in this sample is 115.8 . If the organization's claim is correct, what is the probability of having a sample mean of 115.8 or less for a random sample of this size? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.… read more
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Researchers interested in determining the relative
Researchers interested in determining the relative effectiveness of two different drug treatments on people with a chronic illness established two independent test groups. The first group consisted of… read more
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Master's Degree
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The standard deviation of test scores on a certain
The standard deviation of test scores on a certain achievement test is . A random sample of scores on this test had a mean of . Based on this sample, find a confidence interval for the true mean of al… read more
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A psychologist is interested in the mean IQ score of a given
A psychologist is interested in the mean IQ score of a given group of children. It is known that the IQ scores of the group have a standard deviation of 15. The psychologist randomly selects 50 childr… read more
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PhD in Statistics
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A psychologist is studying the self image of smokers, which
A psychologist is studying the self image of smokers, which she measures by the self-image (SI) score from a personality inventory. She would like to estimate the mean SI score, μ, for the population … read more
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An ecologist randomly samples 15 plants of a specific
An ecologist randomly samples 15 plants of a specific species and measures their heights. He finds that this sample has a mean of 18 cm and a standard deviation of 2 cm. If we assume that the height m… read more
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A worldwide organization of academics claims that the mean
A worldwide organization of academics claims that the mean IQ score of its members is 118, with a standard deviation of 15. A randomly selected group of 35 members of this organization is tested, and … read more
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A coin-operated coffee machine made by BIG Corporation was
A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight ounces of coffee per cup. If it dispenses more that that on average, the corporation may lose money, an… read more
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The scores on an examination in biology are approximately
Second opinion] The scores on an examination in biology are approximately normally distributed with mean 500 and an unknown standard deviation. The following is a random sample of scores from this exa… read more
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The scores on an examination in biology are approximately
The scores on an examination in biology are approximately normally distributed with mean 500 and an unknown standard deviation. The following is a random sample of scores from this examination. 448, 4… read more
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The human resources department of a consulting firm gives a
The human resources department of a consulting firm gives a standard creativity test to a randomly selected group of new hires every year. This year, 90 new hires took the test and scored a mean of 11… read more
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Master's Degree
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The human resources department of an engineering company
The human resources department of an engineering company gives IQ tests to a randomly selected group of new hires every year. They claimed that the mean IQ score of new hires, μ1, from this year is gr… read more
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Hello, I have to complete an ongoing online statistic problems,
Hello, I have to complete an ongoing online statistic problems, is someoneable to assist me complete them?… read more
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