2. Alfred scored 82 in a quiz in English for which the average score of the class was 75 with a standard deviation of 10. He also took a quiz in Statistics and scored 70 for which the average score of the class was 55, and the standard deviation was 14. Relative to other students in the class, did Alfred do better in English or Statistics?

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Q: 1. The mean serum level measured in 12 patients twenty-four hours after they received a newly…

A: Hypothesized Population Mean (µ) = 1 mg/dl The provided sample mean is = 1.2 mg/dl Sample standard…

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A: Given information Mean (µ) = 75 Standard deviation (σ) = 15 Sample size = 9 Sample mean = 80 z score…

Q: A data set has a mean of 60.4 and a standard deviation of 5.2    Is a value of 45 unusual? Is a…

A: From the provided information, Mean (µ) = 60.4 Standard deviation (σ) = 5.2 X~N (60.4, 5.2)

Q: Which is better a score of 82 on a test with a mean of 65 and a standard deviation of 15, or a score…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

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A: Let X be a random variable of normal distribution with mean 120 and standard deviation 25.  Let Z be…

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A: The mean and standard deviation of price of new car in 1965 are 2,650 and 1000. The mean and…

Q: After examining a child at his​ 2-year checkup, the​ boy's pediatrician said that the​ z-score for…

A: The z score is given by Z = 1.31

Q: 1. On a final examination in Mathematics, the mean was 76 and the standard deviation was 5.…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Suppose you are told that a computer programmer in Portugal who makes $809.40 has a z-score of -0.50…

A: Solution: It is given that a computer programmer in Portugal who makes $809.40 has a z-score of…

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Q: Suppose that a large Introduction to Psychology class has taken a midterm exam, and the scores are…

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A: Given, In a medical study, a researcher wishes to select respondents in the middle of 45% of the…

Q: In preparation for the upcoming school year, a teacher looks at raw test scores on the statewide…

A: Let Z be the standard normally distributed random variable with mean 0 and standard deviation 1.

Q: Data was collected on the number of television sets in a household, and it was found that the mean…

A: It is an important part of statistics. It is widely used.

Q: Which is better a score of 91 on a test with a mean of 81 and a standard deviation of 15, or a score…

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Q: A student learns that on his most recent exam in psychology, the sample mean was 72.19 with a…

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Q: 2 درجات annual expenditure per 25-to 34-year-old consumer for health care is $ 1468. Students at a…

A: As the population standard deviation is known, it is the z-test. Given: x¯=1520μ=1468σ=198n=60 The…

Q: 3. Assuming that you wished to have the highest possible score on an exam relative to other scores;…

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Q: A college professor calculates the standard deviation of all the grades from the midterm exams she…

A: Standard deviation: The standard deviation indicates by how much each observation differs from a…

Q: If the average score on a statistics exam was 76, and the standard deviation was 7, what can you…

A: Given : The average score on a statistics exam was 76, and the standard deviation was 7

Q: For a sample of raw scores, you calculate a mean of 15.25 and a standard deviation of 3.19. What is…

A: Introduction:Suppose a random variable, X has sample mean, x̅ and sample standard deviation, s.For a…

Q: What is the z-score of a value of 27, given a set mean of 24, and a standard deviation of 2?

A: Given information Mean (µ) = 24 Standard Deviation(σ) = 2 X = 27

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A: In this question, we have given that probability that a student selected randomly will score between…

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Q: The college physical education department offered an advanced first aid course last semester. The…

A: Given Information: The scores on the comprehensive final exam were normally distributed, and the  z…

Q: Q2: The mean systolic blood pressure, measured in Nasriya City, of 130 men aged between 50-65 years,…

A: Given: n=130x¯=145.5s=2μ=150α=0.05 The test hypothesis are, H0: μ = 150 H1: μ ≠ 150 This is a…

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A: Determine the number of students took the examinations.   The number of students took the…

Q: 14) Find the score that separates the top 80% from the bottom 20% if the Mean is 100 and the…

A: Given information Mean (µ) = 100 Standard deviation (σ) = 26 The score that separates the top 80%…

Q: Which is better a score of 92 on a test with a mean of 71 and a standard deviation of 15, or a score…

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Q: Which is better a score of 95 on a test with a mean of 70 and a standard deviation of 15, or a score…

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Q: Jason's z- score in the 10-k run was -3. if the raw score standard deviation was 5, and the mean…

A:

Q: 4. On a standardized test, scores are normally distributed with a mean of 400 and a standard…

A: GivenMean(μ)=400standard deviation(σ)=80

Q: 4. The results of a state-wide examination of the reading skills of sixth-grade students were…

A: For X, a random variable, the Z-score is, Z=X-μσwhere, μ=population mean             σ=population…

Q: The mean grade of in the final examination in Mathematics was 85 and the standard deviation was 7.…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Is is unusual for someone to run a 4 minute mile if the mean time is 10.2 minutes and the standard…

A: From the provided information, Mean (µ) = 10.2 Standard deviation (σ) = 2.9 X~N (10.2, 2.9)

Q: John scored 60 in a quiz in Math for which the average score of the class was 50 with a standard…

A: Z score is given by where, X is score is mean  is standard deviation

Q: In preparation for the upcoming school year, a teacher looks at raw test scores on the statewide…

A:

Q: Do men take less time than women to get out of bed in the morning? The 42 men observed averaged 7.6…

A: Given : Men  Sample size = nm = 42 Mean = xm = 7.6 Standard deviation = sm = 2.2 Women  Sample size…

Q: A student scored 66 on a general science test where the class mean and standard deviation were 82…

A:

Q: A student scored 76 on a general science test where the class mean and standard deviation were 82…

A: For Science x¯=82s=8x=76 z=x-x¯s=76-828=-0.75

Q: a measure of 29 inches "far away" from a mean of 19 inches? Suppose the data come from a sample…

A: We have given that  Mean=19 , standard deviation=2  X=29

Q: The college board reports that in a recent year, the mean mathematics SAT score was 514, and the…

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Q: In preparation for the upcoming school year, a teacher looks at raw test scores on the statewide…

A: Formula of z score : z = x - μσ

Q: The mear was 80 and the Standard deviation was 4, Kawhi scored 5, 8o his z-Score was more than one…

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Q: 3. In the qualifying examination for the admittance to college, the mean score was 65 and the…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The average score on the Stats midterm was 71 points with a standard deviation of 5 points, and…

A: Given that mean = 71 and SD = 5 And the z score is given by Z = 1

Q: 12. Jim Ray, an avid golfer, keeps records on his scores for 18 holes of golf. When the temperature…

A: