The scores on an economics examination are normally distributed with a mean of 72 and a standard deviation of 16. If the instructor assigns a grade of A to 14% of the class, what is the lowest score a student may have and still obtain an A? (Round your answer to two decimal places.)

Q: For a population with mean of 50 and standard deviation of 8, what is the Z-score that corresponds…

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Q: Suppose IQ scores are approximately normally distributed with a mean  of 100 and a standard…

A: Given, Mean =μ=100SD = σ=15

Q: If a population has a standard deviation of 16, what is the minimum number of samples that need to…

A: Given,standard deviation (σ)=16margin of error (E)=2α=1-0.88=0.12α2=0.06Z0.06 =1.5548

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given data, Mean = 69 SD = 7

Q: In a recent year, the ACT scores for high school students with a 3.50 to 4.00 grade point average…

A: The mean is 25.7 and the standard deviation is 3.3.

Q: According to a research paper, the carbon monoxide exposure of someone riding a motorbike for 5 km…

A: From the provided information, Mean (µ) = 18.4 ppm Population standard deviation (σ) = 5.3 ppm X~N…

Q: For a population with mean of 50 and standard deviation of 8, what is the z-score that corresponds…

A:

Q: For a population with mean of 50 and standard deviation of 8, what is the Z-score that corresponds…

A:

Q: Suppose the people living in a city have a mean score of 35 and a standard deviation of 10 on a…

A: Heh there! Thanks for posting the question. Your question has more than three sub-parts. However, we…

Q: If the distribution of weight of newborn babies in Maryland is normally distributed with a mean of…

A:

Q: The results of a calculus exam are normally distributed with a mean of 76 and a standard deviation…

A: Obtain the Z-score for the random variable that X equals 70. The Z-score for the random variable…

Q: In a large section of a statistics class, the points for the final exam are normally distributed,…

A:

Q: The heights of adult men in America are normally distributed, with a mean of 69.6 inches and a…

A: GivenHeights of adult men in Amrica are normally distributed withMean(μ)=69.6 inchesstandard…

Q: I don't understand how to solve for this. I'm having trouble understanding the percentages

A: Let us define the random variable X as the points for the final exam that are normally distributed…

Q: If 10 were added to each of the values in a data set that originally had a standard deviation of 6,…

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Q: Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of…

A: We have, the population mean, μ=100                the standard deviation, σ=15 Let X=IQ score

Q: The results of a calculus exam are normally distributed with a mean of 76 and a standard deviation…

A:

Q: On a college admissions test where the scores wereapproximately normally distributed, Amy’s score of…

A:

Q: The price-earnings (PE) ratios of a sample of stocks have a mean value of 10.75 and a standard…

A: Empirical Relationship: The empirical rule states that if a distribution is unimodal and symmetric…

Q: Given a population of 5000 scores with a mean of 86 and a standard deviation of 10, how many scores…

A:

Q: What was the cutoff for a failing score? Approximately what percentage of the students failed?

A: The scores on a psychology exam were normally distributed with a mean of 68 and a standard deviation…

Q: The heights of adult men in America are normally distributed, with a mean of 69.7 inches and a…

A: Given Data,Adult Men  Adult womenμ = 69.7  | μ = 64.7σ= 2.69   | σ = 2.51

Q: In the past Algebra classes, records show that the average score of the students in the mid-term…

A: As per our guidelines we can solve first three subpart and rest can be reposted. Solution-: Let, X=…

Q: n a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: The mean incubation time 69 and standard deviation 8 The lowest score for A is calculated as…

Q: If a distribution of test scores is normal, with a mean of 78 and a standard deviation of 11, what…

A: Given Information: If a distribution of test scores is normal, with a mean of 78 and a standard…

Q: If a distribution of test scores is normal, with a mean of 78 and a standard deviation of 11, what…

A: Let X be a test score. Then, X ~N(78,112). Then, X~N(78,112)⇒Z=X-7811~N(0,1) a.) P[ Test score is…

Q: Suppose that the price of an item is normally distributed with a mean of 50 and a standard deviation…

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Q: The heights of adult men in America are normally distributed, with a mean of 69.5 inches and a…

A:

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A: We have given that mean = μ = 50standard deviation = σ = 8 z = 0.25

Q: If a researcher devises a test of emotional intelligence with a mean of 50 and a standard deviation…

A: We want to find the probability  P(40<X<50)

Q: For a population with  = 150, a raw score of X = 125 corresponds to z = -2.00.  What is the standard…

A: Consider that the mean and standard deviation of a random variable x are µ and σ, respectively.…

Q: In a large section of a statistics class, the points for the final exam are normally distributed,…

A:

Q: If a data value has a z-score of 3.00 and the mean of the distribution is 100 with a standard…

A: 1) Given data, z=3 μ=100 σ=15 X=?

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: The mean incubation time 69 and standard deviation 18 The cutoff for A is calculated as follows:…

Q: The scores on an economics examination are normally distributed with a mean of 75 and a standard…

A:

Q: The distribution of the annual incomes of a group of middle management employees approximated a…

A: In question, The distribution of annual income of middle management employees approximated normal…

Q: Given that the mean of a data set is 20, and the standard deviation of this data se is 8, then what…

A: Given data,μ=20σ=8x=40z=?

Q: A doctor measured serum HDL levels in her patients, and found that they were normally distributed…

A:

Q: Q scores are approximately normally distributed with a mean of 100 and standard deviation of 15, the…

A: Given: μ=100, σ=15 The corresponding z-value needed to be computed is: The probability that people…

Q: The results of a calculus exam are normally distributed with a mean of 76 and a standard deviation…

A:

Q: For a population with mean of 50 and standard deviation of 8, what is the z-score that corresponds…

A: Given that , mean = μ = 50 standard deviation = σ = 8 x = 46

Q: For a population with a mean of ? = 80 and a standard deviation of ? = 12, a score of X = 77…

A: Given : population mean = 80 standard deviation = 12 score of X = 77

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A:

Q: A doctor measured serum HDL levels in her patients, and found that they were normally distributed…

A: Given mean= 63.3  And standard deviation = 3.9  a)

Q: On a measure of​ anxiety, the mean is 83 and the standard deviation is 12. What are the Z scores for…

A: Given: Mean (M) = 83 Stndard deviation (SD) = 12 Formula:

Q: For a population with mean of 50 and standard deviation of 8, what is the z- score that corresponds…

A:

Q: Multiple questions

A: Given dataMean = 71Standard Deviation = 8a)The Lowest Score for A grade is given by p-value will be…

Q: For a population with mean of 50 and standard deviation of 8, what is the raw score that corresponds…

A: GivenMean(μ)=50standard deviation(σ)=8z=2.50

Q: If the mean of the variable Depression is 32 and its standard deviation is 6, which of the following…

A: Ans#- Given, If the mean of the variable Depression μ = 32 and its standard deviation σ = 6,…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, Mean = 71 SD = 8