Calculus and Above

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1. Normal Distributions: Finding Values Data from a state
1. Normal Distributions: Finding ValuesData from a state indicate that scores on the SAT test are normally distributed with a mean of 1120 and a standard deviation of 200. Scores on the ACT test are n… read more
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A population of values has a normal distribution with μ=47.2
A population of values has a normal distribution with μ=47.2 and σ=90.5 . You intend to draw a random sample of size n=147Find P41, which is the score separating the bottom 41% scores from the top 59%… read more
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Imagine a population distribution with a mean of 47.33 and a
Imagine a population distribution with a mean of 47.33 and a standard deviation of 3.48 which is normally distributed.If a random sample of n = 25 is drawn from this distribution, what score would it … read more
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Imagine a population distribution with a mean of 60 and a
Imagine a population distribution with a mean of 60 and a standard deviation of 5 which is normally distributed.If a random sample of n = 25 is drawn from this distribution, what is the probability of… read more
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Suppose that all college freshmen have to take a statistics
Suppose that all college freshmen have to take a statistics proficiency exam during the week of registration. Scores are normally distributed with a mean of 92 and a standard deviation of 18.It turns … read more
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Imagine a population distribution with a mean of 47.33 and a
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Imagine a population distribution with a mean of 47.33 and a
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For a normal distribution with a mean of 45 and a standard
For a normal distribution with a mean of 45 and a standard deviation of 5, find each of the following values:What score separates the top 25% from the bottom 75%… read more
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A distribution of values is normal with a mean of 215 and a
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In one region, the September energy consumption levels for
In one region, the September energy consumption levels for single-family homes are found to be normally distributed with a mean of 1050 kWh and a standard deviation of 218 kWh If 50 different homes ar… read more
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A population of values has a normal distribution with μ =
A population of values has a normal distribution with μ = 178 and σ = 56.6 . You intend to draw a random sample of size n = 180 .Find P8, which is the mean separating the bottom 8% means from the top … read more
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Assume that adults have IQ scores that are normally
Assume that adults have IQ scores that are normally distributed with a mean of 101.8 and a standard deviation 23. Find the first quartile Upper Q 1​, which is the IQ score separating the bottom​ 25% f… read more
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A distribution of values is normal with a mean of 42.1 and a
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The distribution of SAT scores is normal with a mean of µ =
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1. If Z is a standard normal variable, what is the probability
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The college boards a test given to students yield a mean score
hello and thank you for your help last night. i have two more questions and need to make sure i am on the right ttrack. question 1: the college boards a test given to students yield a mean score of 50… read more
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Explain what a “sampling distribution of sample means” is.
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A non-normal population is determined to have a mean of 60
A non-normal population is determined to have a mean of 60 and a standard deviation of 4. Ninety-six percent of all observed values will occur in what range? (multiple choice) a) 52.16 - 67.84, b) 50 … read more
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