If X is a normally random variable with a mean of 50 and a standard deviation of 8, how many standard deviation away from the mean is each of the following values of X? 1. x= 35 2. x= 64

Q: For a population with a mean of u=40 and a standard deviation of σ=8, find the z-score corresponding…

A:

Q: A sample has a mean of M =75 and a standard deviation of s = 15 . Find the z-score for each of the…

A: Given that, Mean (M) =75 Standard deviation (s) = 15

Q: 28) Suppose the scores on an exam have a mean of 75 with a standard deviation of 8. If one student…

A: Given that.   X~N( μ , ?^2 )   Z-score =( x - μ )/?   NOTE:- According to bartleby guidelines expert…

Q: A population has a mean of u = 65 and a standard deviation of o = 15. If you select a random sample…

A: From the provided information, Mean (µ) = 65 Standard deviation (σ) = 15 X~N (65, 15)

Q: A survey asks a random sample of 1500 adults in Ohio if they support an increase in the state sales…

A: From the provided information, Sample size (n) = 1500 adults 40% of all adults in Ohio support the…

Q: A population has a mean of μ=30 and a standard deviation of σ=8.If the population distribution is…

A: Obtain the standard z-score for the random variable M equals 34 The standard z-score for the random…

Q: A sample from a population witha mean of μ = 40, and a standard deviation of σ = 10, has a mean of…

A: Where,

Q: 1. Suppose that the mean of A is 360 and the standard deviation of A is 40. The mean of B is 45 and…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: A golfer claims that his average golf score at the course he plays regularly is less than 90. A…

A: Given information- Sample size, n = 35 Population standard deviation, σ = 3.4 True population mean,…

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

A: Given serum HDL levels in patients are normally distributedmean = 62standard deviation = 3.6The Z…

Q: Suppose that for a certain population of college students, the mean GPA is 2.84 with a sta deviation…

A: Given that  U=eXV=e2X From the question 9,  EX=2.84σX=0.45

Q: For a population with a mean of μ= 50 and a standard  deviation of σ= 10, compute the standard error…

A: For a population with mean µ  and standard deviation σ, the standard error is σM = σ/√n, where M is…

Q: Suppose that chemistry exam scores are normally distributed with a mean of 28 and a standard…

A: In question, Given that chemistry exam scores are normally distributed with a mean of 28 and a…

Q: Suppose you were to take samples of size 100 from a population with a mean of 12 and a standard…

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Q: If a random variable that is normally distributed has a mean of 25 and a standard deviation of 3,…

A: Let X be a random variable such that X~N25,32 The Z score is given by Z=x-253 a) Therefore, when x =…

Q: Suppose the scores on an exam have a mean of 60 with a standard deviation of 10. If one student has…

A:

Q: A random sample of n = 4 scores is selected from a population with a mean of 50 and a standard…

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Q: )A potato chip manufacturer has found that in the past the standard deviation of bag weight has been…

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Q: A population has a mean of 75 and a standard deviation of 15. You randomly sample nine people from…

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Q: A set of test scores has a mean of 27 and a standard deviation of 4.2. Calculate the raw scores for…

A: We have given that, A set of test scores has a mean of 27 and a standard deviation of 4.2   The…

Q: A previous study claims that the average time a teenager spends browsing his social media accounts…

A:

Q: A population has a mean of u deviation of o = 10. a. If 3 points were added to every score in the…

A: (a) The population has mean 50 and population standard deviation 10. Calculation: If n points added…

Q: For a population with a mean of μ = 28 and a standard deviation of σ = 12, find the z-score…

A:

Q: In a population with a μ = 8, a score of X = 3 corresponds to z = –2.5. What is the standard…

A: Mean = 8 Raw score , X = 3 Z score = - 2.50

Q: 27. On an exam with a mean of u = 80, a person scores X = 90. Which of the following values for the…

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Q: Suppose a 60-watt light bulb produced by a company has a mean life of 750 hours with a standard…

A: Let us assume the population mean and standard deviation for a distribution is μ and σ. Let a sample…

Q: A population has a mean of u=50 and a standard deviation of O=20 A. Would a score of x=70 be…

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

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

A:

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

A:

Q: A population has a standard deviation of 16. If a sample of size 64 is selected from this…

A: We know for a Normal distribution ,  the empirical rule predicts that 68% of observations falls…

Q: For a population with a mean of 40 and a standard deviation of 8 find the z score corresponding to…

A: a. The population mean is 40 and a standard deviation is 8. The z-score of x=34 for a sample of n=1…

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

A:

Q: A population of scores has u = 50 and o = 5. If every score in the population is multiplied by 3,…

A: If a constant value multiplies to each score in distribution, then the mean and standard deviation…

Q: What is the z-score of x = 9 if it is 1.5 standard deviations to the left of the mean? a. z= + 1.50…

A: The given information is- x = 9 is 1.5 standard deviations to the left of the mean. So, for this…

Q: A population has a standard deviation of 16. If a sample of size 64 is selected from this…

A: Here we've to Calculate z score but to Calculate z score we need mean (mu). And mean is not given…

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Q: If the temperature at which a certain compound melts is a random variable with mean value 115°C and…

A: It is given that  Mean = 1150C Standard deviation = 40C 0F = 1.80C + 32

Q: A sample of n = 20 scores has a mean of M = 45 and a standard deviation of s = 6.  In this sample,…

A:

Q: What value of x is two standard deviation to the right of the mean if X ~ N(10, 1)? O 1 O 2 O 4 0 6…

A:

Q: Suppose the scores on an exam havea mean of 70 with a standard deviation of 10. If one student has a…

A: Mean = 70 Std dev = 10

Q: For a population with a mean of μ = 100 and a standard deviation of σ = 20, a. Find the z-score for…

A: (a) Obtain the standard z-score for the random variable X equals 108. The standard z-score for the…

Q: For a population with a mean of μ= 100 and a standard deviation of σ=20,  Find the  X values that…

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Q: 5. In a population with m = 65 and s = 6, Fred is 1 ½ standard deviations above the mean, John's…

A: Hi there! Thanks for posting the question. Since there are multiple questions, we will solve one…

Q: A random sample of 90 observations produced a mean of ?⎯⎯⎯=26.3 from a population with a normal…

A: The given data: Mean, x¯=26.3 Standard deviation,σ=2.08 Sample of observation, n=90  (a) 90%…

Q: In a sample with M = 60 and s = 10 a score of X = 70 corresponds to a z-score of z = +1.00 because…

A:

Q: For a population with a population mean = 60 and a population standard deviation = 9, find the score…

A: For a population with a population mean = 60 and Population standard deviation = 9

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.