Calculus and Above

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Use the given degree of confidence and sample data to
Use the given degree of confidence and sample data to construct a confidence interval for the population mean μ. Assume that the population has a normal distribution.A sociologist develops a test to m… read more
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A sample of 110 body temperatures having a mean of 98.20 F
A sample of 110 body temperatures having a mean of 98.20 F and a sample standard deviation of 0.62 F. Construct a 95% confidence interval to estimate the standard deviation of body temp. Round to thre… read more
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A random sample of 200 adults was given a IQ test. It was
A random sample of 200 adults was given a IQ test. It was found that 118 of them scored higher than 100. Based on this compute a 90% confidence interval for the proportion of all adults whose IQ score… read more
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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 psychologist is interested in the mean IQ score of a group
A psychologist is interested in the mean IQ score of a group of children. It is known that the IQ scores of the group have a standard deviation of 16. The psychologist randomly selects 150 children fr… read more
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The mean diastolic blood pressure for a random sample of 70
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A psychologist wants to estimate the standard deviation of
second opinion] A psychologist wants to estimate the standard deviation of IQ scores. It is widely believed that the IQ scores follow a normal distribution. Her random sample of 24 IQ scores has a mea… read more
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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 11.4. A random sample of 60 scores on this test had a mean of 72.3. Based on this sample, find a 99% confidence interval for the … read more
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A psychologist wants to estimate the standard deviation of
A psychologist wants to estimate the standard deviation of IQ scores. It is widely believed that the IQ scores follow a normal distribution. Her random sample of 24 IQ scores has a mean of 96.5 and a … read more
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A psychologist wants to estimate the standard deviation of
A psychologist wants to estimate the standard deviation of IQ scores. It is widely believed that the IQ scores follow a normal distribution. Her random sample of 24 IQ scores has a mean of 96.5 and a … read more
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The lifetime of a certain brand of electric light bulb is
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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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The lifetime of a certain brand of electric light bulb is
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The human resources department of a consulting firm gives a
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A research company desires to know the mean consumption of
A research company desires to know the mean consumption of milk per week among males over age 45. A sample of 1842 males over age 45 was drawn and the mean milk consumption was 4.9 liters. Assume that… read more
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1. A random sample of 92 observers produced a mean X = 25.8
1. A random sample of 92 observers produced a mean X = 25.8 and a standard deviation s = 2.6. a) Find a 95% confidence interval for 11. b) Find the 90% confidence interval for Jl c) Find the 99% confi… read more
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a) From the information given here, determine the 95% confidence
a) From the information given here, determine the 95% confidence interval estimate of the population mean. Xbar = 100 σ = 20 n = 25 b) Repeat part (a) with xbar = 200. c) Repeat part (a) with xbar = 5… read more
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1. a) From the information given here, determine the 95% confidence
1. a) From the information given here, determine the 95% confidence interval estimate of the population mean. Xbar = 100 σ = 20 n = 25 2. b) Repeat part (a) with xbar = 200. c) Repeat part (a) with xb… read more
Chirag
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