23. The mean of the sample means equals population mean divided by the standard deviation divided by the square root of the sample size population mean sample mean divided by the standard deviation population mean divided by the standard deviation

Q: The U.S. Department of Transportation provides the number of miles that residents of the 75 largest…

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Q: All of the below sets have the same mean.       Set 1-Standard Deviation=3.1       Set 2-Standard…

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Q: according to chebyshev's theorem, at least 88.9% of data will be between   Mean=15.4  Standard…

A: Chebyshev's theorem gives the minimum proportion of the data which must lie within a given number of…

Q: What percent of the population lies between +1.96 standard deviations above the mean and +2.58…

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

Q: Suppose that X is normally distributed with mean 110 and standard deviation 18.  What proportion of…

A: Given that, Mean = 110 Standard deviation = 18

Q: 3. To compare the braking distances for two types of tires, a safety engineer conducts 35 braking…

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Q: 2. The head of a school clinic in a certain elementary school wants to estimate the mean height (in…

A: Given that alpha =0.05,s.d =30 ,M.E = 4

Q: The Sum of Squared Errors for a data set of 18 numbers is 36. What is the standard deviation?

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Q: What does Chebyshev’s rule say about the percentage of observations in any data set that lie within…

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Q: 2. If the mean of a standardized test with a normal distribution is 54.3 and the standard deviation…

A: Mean, μ = 54.3 Standard deviation, σ = 4.6

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

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Q: A normally distributed set of data has been generated where 50% of the data lies below 97 and 70%…

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Q: 4.) Determine the range and Standard Deviation of the set of data 4, 8, 9, 11, 13, 15

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Q: If 40 is added to cach of a set ofr 25 values, the Coefficient of Variation changes to 40 % and if…

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Q: uppose you have a data set of size of 26 with mean 50 and standard deviation 8. If u subtract 8 from…

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Q: Suppose the number of dollars spent per week on groceries is normally distributed. If the population…

A: Given information: Population standard deviation, σ is 7 dollars. Margin of error, E is 3 dollars.…

Q: 6.) The daily water usage per person in Davao City is normally distributed with a mean of 18 gallons…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: 5.according to the empirical rule how much of the data lies within two standard deviations of the…

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Q: A government agency provides the number of miles that residents of the 75 largest metropolitan areas…

A: The random variable X follows normal distribution. There are two samples of data which are named as…

Q: Suppose that the mean of a set of data is 50.2 and the standard deviation is 4.2.  Assume that the…

A: Given  μ=50.2, σ=4.2, h=5.1  We want to find the new mean and standard deviation.

Q: How to find what numbers 89% lie between with a mean of 24 and a standard deviation of 4

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Q: Suppose that heights of adult men in the United states are normally distributed with a mean of 71…

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Q: 16. In a standardized test with a normal distribution of scores, the mean is 63 and the standard…

A: here use normal curve property and value near to center in curve have more chance to occur

Q: 2. Calculate the standard deviation for the data set below: 1, 3, 4. 5, 6, 9, 12, 16 (X-Mean)…

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Q: . What can we learn from analyzing the standard deviation for a dataset that we can't learn from the…

A: Mean tells the average value of the data set. Median tells the middle value of the data set and can…

Q: 2. In a particular normally distributed set of scores, the mean is 65.75 and thestandard deviation…

A: As per the honor code, We’ll answer the first question since the exact one wasn’t specified. Please…

Q: A population has µ = 50 and o - 5. If 10 points are added to every score in the population, what are…

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Q: Calculate the mean if -2 standard deviation = 70 and +2 standard deviation = 100. The mean of the…

A: -2 standard deviation is given by, (Mu-2sigma)= 70  Mu+2sigma= 100 Where mu is mean and sigma is…

Q: (12) Suppose you have two sets of sample data. The standard deviation and the Interquartile Range…

A: Inter Quartile Range (IQR): Type of resistant measure. Standard deviation (SD=σ): Spread or…

Q: A quantitative data set has mean 15 and standard deviation 2. what is percentage lies between 13 and…

A: Note: Thank you for the question. For the calculation, it is assumed that the quantitative data set…

Q: Suppose that the score on a reading test are normally distributed within a mean of 70 and a standard…

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Q: If the true mean is 9590 with the standard deviation of 0.0080 within what interval will 98% of…

A: Given that , True mean = 9590 Standard Deviation = 0.0080

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: 2. A university dean wishes to estimate the average number of hours his part-time instructors teach…

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Q: 4. Show that mean deviation about mean is

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Q: 4. What is the range of data values that would allow 99% of the fall within the mean? 5. Why does…

A: “Since you have mentioned the question number 4 and 5, we will solve that question for you. If you…

Q: 2. What is the difference between the standard deviation and the coefficient of variation? When is…

A: Standard deviation: Stan. deviation shows how far the observations are form the mean of the data.…

Q: mean is 72 and standard deviation is 8 what is  P( x ≤ 72)

A: Given,mean(μ)=72standard deviation(σ)=8

Q: 5.The achievement scores for a college examination are normally distributed with mean 75 and…

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Q: Suppose you have the population 50 and 80 and that their corresponding z-scores are -1 and -2,…

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Q: 1. The scores of individual students on a nationaltest have a normal distribution with mean 18.6 and…

A: (As per bartleby guidelines, for multiple questions asked, only the first question will be solved.…

Q: The variance of a sample of 169 observations equals 576. The standard deviation of the sample equals

A: Givenvariance(σ2)=576

Q: Calculate the standard deviation for the data set below: 1, 3, 4. 5, 6, 9, 12, 16 (X-Mean) (X-Mean)?…

A: According to the problem,we have

Q: Suppose we are told the sampling distribution developed from a sample of size 900 has a mean of…

A: Consider the variable of interest is X.

Q: Suppose that the heights of adult men in the United States are normally distributed with a mean of…

A: From the provided information, Mean (µ) = 70.5 inches Standard deviation (σ) = 3.5 inches Let X be a…

Q: Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. A sample…

A: Formula : The standard error of the mean  : σ_x̄ = σ/√n

Q: 2. Write a paragraph that explains why "the z-score associated with the raw score of x; (i.e., zri)…

A: Given : Z score associated with raw score of xi is number of standard deviation above or below  the…

Q: About what percent of x values lie between the first and second standard deviations from the mean…

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Q: A sociologist found that in a sample of 45 retired men, the average number of jobs they had during…

A: Given : population mean ,u = 7.2  population standard deviation,σ = 2.3

Q: Suppose 450 test scores are normally distributed with mean 73.7 and standard deviation 2.5. a. How…

A: Given that  mean = 73.7 and standard deviation =  2.5