Calculus and Above

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Determine the sample size n needed to construct a 90​%
Determine the sample size n needed to construct a 90​% confidence interval to estimate the population proportion when p=0.68 and the margin of error equals 8​%. n=nothing ​(Round up to the nearest​ in… read more
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A physician with a practice is currently serving 280
A physician with a practice is currently serving 280 patients. The physician would like to administer a survey to his patients to measure their satisfaction level with his practice. A random sample of… 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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For your initial post, create an example of an application
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A botanist wishes to estimate the typical number of seeds
A botanist wishes to estimate the typical number of seeds for a certain fruit. She samples 45 specimens and counts the number of seeds in each. Use her sample results (mean = 50.4, standard deviation … 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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The human resources department of a consulting firm gives a
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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 supervisor records the repair cost for 17 randomly
The supervisor records the repair cost for 17 randomly selected tvs. A sample mean of \$94.57 and standard deviation of \$20.65 are subsequently computed. Determine the 80% confidence interval for the m… 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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I Calculated The Sample Mean For 12 Randomly Selected High
I calculated the sample mean for 12 randomly selected high school seniors' test scores. The mean was 908.3 and the sample standard deviation was 305.4. Can you construct a 99% confidence interval for … read more
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1.) Suppose we wish to estimate the mean of the property tax
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A principal at a school randomly selected six students to take
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For questions needing a probability table, please use the table
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A worker randomly selects 16 packages from the mail. The sample
A worker randomly selects 16 packages from the mail. The sample has a mean weight of 13.5 lbs and a population standard deviation of 3.21 lbs. The weights of all packages are normally distributed. a. … read more
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Explain what a “sampling distribution of sample means” is.
Explain what a “sampling distribution of sample means” is. Be specific! Fill in the blanks in the statements below. The Central Limit Theorem states that as the sample size increases, the distribution… read more
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A photographer is going to take a shot of a group of 6 persons.
A photographer is going to take a shot of a group of 6 persons. In how many ways can he arrange them in one row?… read more
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An auditor wants to estimate what proportion of a banks commercial
An auditor wants to estimate what proportion of a bank's commercial loan files are incomplete. The auditor randomly samples 80 files and finds 12 are incomplete. Using a 95% confidence interval, estim… read more
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