A score that is 6 points below the mean correspond. to a z-score of z = -2.00. What is the population standard deviation?

Q: People with z-scores above 2.5 on an IQ test are sometimes classified as geniuses. If IQ scores have…

A: Given,   People with z-scores above 2.5 on an IQ test are sometimes classified as geniuses. If IQ…

Q: A population has a mean of μ= 30 and a standard deviation of σ = 5.  If 5 points were added to every…

A: The value of population mean is μ=30. If 5 points were added to every score in the population, then…

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

A: Given data,μ=400σ=80P(X<x)=80%=0.80x=?

Q: On a statistics exam, the mean score was 80 and there was a standard deviation of 7. If a student's…

A: Given data, μ=80σ=7If x=92z=?

Q: What z-score would be associated with the value x = 124?

A: Given that Mean = 133 SD = 6 And the value is X = 124

Q: A population data set has a mean of 81 and a standard deviation of 5.2. Find the z-scores for each…

A: Population mean, μ=81 population standard deviation, σ=5.2 The formula of z-score is, z=x-μσ…

Q: If a sample has a mean of 100 and a standard deviation of 6, what is the value in the data set that…

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Q: For a population with mean 80 and standard deviation 6, what is the z-score corresponding to X = 68…

A: Given :Population mean u=80Standard deviation σ=6X=68

Q: A score that is 12 points below the mean corresponds to a z-score of z =-1.50. What is the standard…

A:

Q: Suppose the scores of students on an exam are normally distributed with a mean of 276 and a standard…

A: X~N(μ= 276 , σ= 59 ) μ= 276 , σ= 59 Formula for Z-score Z=(X-μ)/σ

Q: A given distribution has a population mean, μ, of 131 and a population standard deviation, σ, of 14.…

A: Given information Mean = 131 Standard deviation = 14

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days…

A: From the given Information, Let X represent the length of pregnancies in a small rural village and…

Q: For a population with mean 90 and standard deviation 10, what is the z-score corresponding to X =…

A:

Q: A given distribution has a population mean, μ, of 114 and a population standard deviation, σ, of 12.…

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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: A distribution is given as X ~ U(0, 12). What is the theoretical standard deviation?

A: concepts and reasonuniform distribution is a continuous probability distribution.it is defined…

Q: What is the corresponding Z score ? Mean is 70, standard deviation is 10 and X= 89

A: We have to find z score.

Q: For a population with a standard deviation of σ = 6, what is the z-score corresponding to a score…

A: We are given:

Q: Given a mean of 1,500 and a standard deviation of 53, calculate the value that is 2 standard…

A: Given that, Mean = 1500 Standard deviation = 53

Q: 2. A score that is 9 points above the mean corresponds to a z-score of 1.5. What is the standard…

A: Given information x - µ = 9 z = 1.5

Q: The final grades in a math class has a mean of 77 and a standard deviation of 9.77 if the professor…

A: Here we need to find the cutoff for A grade. Given that the top 10% are given A. We assume that the…

Q: A score that is 6 points below the mean corresponds to a z-score of z = -2.00. What is the…

A: Given: z-score = -2.00 Formula: Where,

Q: If a sample has a mean of 48 and a standard deviation of 3.2, what is the value in the set that…

A:

Q: In a particular examination, the mean score is 82 and the standard deviation is 3.7. Wha is the Z-…

A: Given that the mean is 82 and standard deviation is 3.7. That is, μ=82σ=3.7

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: For a population with a standard deviation of σ = 5, what is the z-score corresponding to a score…

A: We have to find z score..

Q: For a social club, the members had a mean age of 68 and a standard deviation of 10 years.  What is…

A: The mean is 68 and the standard deviation is 10.

Q: A score that is 6 points below the mean corresponds to a z-score of z = -1.50. What is the…

A: We have to find population standard deviation from given information. We need to use z score…

Q: A score that is 9 points above the mean corresponds to a z-score of z = 1.50. What is the population…

A:

Q: If you score 76 on a commercial pilot exam that has a mean score of 70 and a standard deviation of…

A: We have to find given percentile ....

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days…

A:

Q: A score that is 20 points above the mean corresponds to a z-score of z – 1.25. What is the standard…

A: Given: z= 1.20 20 points above the mean. that is

Q: The scores on the final exam in a statistics course are close to being normally distributed. The…

A: Normal distribution: It is a continuous probability distribution, that is bell-shaped with lighter…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days…

A: Let X be the lengths of pregnancies in a small rural village x¯=262sd=16 X~ Normal (262, 162)   For…

Q: THE SCORES ON THE SAT MATH HAD A MEAN OF 431 AND A STANDARD DEVIATION OF 117. What percent of…

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Q: What z-score would be associated with the value x = 172?

A: Given that Mean = 112 SD = 10 And value X = 172

Q: A z-score of +1.6 represents a value which is how many standard deviations above the mean?

A:

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 263 days…

A: Solution-: Given: μ=263 days, σ=13 days We want to find what range would you expect to find the…

Q: The mean June midday temperature in Desertville is 36°C and the standard deviation is 3°C. Assuming…

A: Determine the number of days in June would be expected the midday temperature to be between 39°C and…

Q: A population has a mean of μ and a standard deviation of  . a. If 3 points were added to every…

A:

Q: Suppose a population is known to be normally distribted with a mean, μ, equal to 116 and a standard…

A: Given information- Population mean, μ = 116 Population standard deviation, σ = 14 So, the percent of…

Q: A population has a mean of u=50 and a standard deviation of 0=10. If 3 points were added to every…

A: The properties of mean are:E(X + a) = E( X ) + a * E(X+a)=E(X)+aE(aX)=aE(X)The property of variance…

Q: Given a mean of 75 and a standard deviation of 7, what percentage of scores are above 85?

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

A: From the given information,   Mean = 100 Standard deviation = 15   The objective is to find the…

Q: A mean of 200 and a standard deviation of 50. Find P60, the score which separates the lower 60% form…

A:

Q: A statistics professor announces that 15% of the grades he gives are As.  The results of the final…

A: Solution:From the given information, mean score is 83, standard deviation is 6. The fifteen…

Q: If a raw score is 28 in a distribution in which the mean is 20 and the standard deviation is 2, what…

A: Given information- Population mean, µ = 20 Population standard deviation, σ = 2 We have to find the…

Q: Suppose a class average on a test is 75 and the standard deviation is 10. if joe scores 80 on the…

A:

Q: What are all the values that standard deviation "s" can possibly take?

A: Standard deviation S=x1;x2n-1and ,Standard deviation is the positive squarew root of the variance…