The average playing time of music albums in a large collection is 34 minutes, and the standard deviation is 3 minutes. (a) What value is 1 standard deviation above the mean? 1 standard deviation below the mean? What values are 2 standard deviations away from the mean? 1 standard deviation above the mean 1 standard deviation below the mean 2 standard deviations above the mean 2 standard deviations below the mean (b) Without assuming anything about the distribution of times, at least what percentage of the times are between 28 and 40 minutes? (Round the answer to the nearest whole number.) At least % (c) Without assuming anything about the distribution of times, what can be said about the percentage of times that are either less than 25 minutes or greater than 43 minutes? (Round the answer to the nearest whole number.) No more than %

Q: The reading test scores for the population of fifth graders is normally distributed with a mean of…

A: Given: X~Normalμ=55,σ2=82

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A: Formula : Let , mean = μ and standard deviation = σ The test score below 'a' standard deviation of…

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A: Here, mean is 105 and standard deviation is 10.

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A: Given that, The scores on a standardized test are normally distributed with, Mean = 95 Standard…

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A:

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A:

Q: The mean playing time for a large collection of compact discs is 34 minutes, and the standard…

A:

Q: A normal population has a mean= 61 and standard deviation=16. what proportion of the population is…

A: From the provided information, Mean (µ) = 61 Standard deviation (σ) = 16 X~N (61, 16)

Q: Whenever we convert scores from their original units of measurement (e.g., minutes, MPH, ounces)…

A: The z score is defined as Z = (X - mean)/SD

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A: Given that ,                    sample size n=100                    Mean u=80…

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A: Consider X be the random variable representing the he scores on a standardized test.    X is…

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A: Based on the Concept of Empirical Rule: About 68% of the area under the curve falls within 1…

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A: It is given that, the z-score for Karen’s first psychology exam is -1.

Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…

A:

Q: The scores on a standardized test are normally distributed with a mean of 120 and standard deviation…

A: From the provided information, Mean (µ) = 120 Standard deviation (σ) = 10 The test score is 2.1…

Q: It is possible to have a standard deviation of -1 for some data set? True or False

A: See the below solution

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A: Here we have given the question about mean of the heights. Given, Your height in inches is compared…

Q: The scores on a standardized test are normally distributed with a mean of 85 and standard deviation…

A: If X be the scores. It is known- X~N85, 202 where, m: mean = 85 s: standard deviation = 20

Q: A health expert evaluates the sleeping patterns of adults. Each week she randomly selects 50 adults…

A: The sample size, i.e., the sampled number of adults, n=50.It is given that 5% of the average sleep…

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A: The standard deviation is defined how much deviation from the mean is called standard deviation.

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A: The given information is that the score on a standardized test are distributed normally with mean…

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A: The test score is 0.6 standard deviations above the mean is obtained below: From the given…

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A: Since z-score is a measure of how far the standard deviation is away from the mean (Above/below).…

Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…

A:

Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: he scores on a standardized test are normally distributed with a mean of 120 and standard deviation…

A:

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A: Given data,Mean μ=100sd     σ=15If z-score=0.8x=?

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A:

Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…

A: Mean = 95 Standard deviation = 2

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A: Given that,  μ=120,σ=5,z-score = 1.1 The formula for calculating the test score is

Q: The average playing time of music albums in a large collection is 32 minutes, and the standard…

A: Given that μ=32 and σ=7 1 standard deviation above the mean: μ+σ=32+7=39 1 standard deviation below…

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A: The scores on a standardized test are normally distributed with Mean = 115 Standard deviation = 20

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A: Mean()=85standard deviation()=10

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A: Here given that the mean =59, standard deviation=4, z score=0.04, we need to find the raw score x.

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A: Given information: Population meanμ=75. Population standard deviationσ=5. Let X be the scores for…

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A: We have given that Mean(µ) = 5Standard deviations (σ) = 1X ~ N (µ, σ )= N(5, 1)