Suppose that a random sample of 17 adult US males has a mean height of 69 inches with a standard deviation of 2.5 inches. If we assume that the heights of adult males in US is normally distributed, find the 95% confidence interval for the mean height of all US males.

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: Assume that adults have iq scores that are normally distributed with a mean of 100 and a standard…

A: Solution: Let X be the adults IQ score has normally distributed with mean μ=100 and standard…

Q: The speeds of all cars on the tollway was found to be normally distributed with a mean of 63 miles…

A: It is given that that µ=63 mile per hour. Obtain the standard deviation of the speeds of all cars:

Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

A: The sample mean and the standard deviation are μ = 80 and σ = 12 respectively.Let X denotes the…

Q: If a population has a mean of 15 and standard deviation of 3, what is expected of the sample mean…

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Q: What is the z-score for this raw score?

A: Let ,  Our aim is to find the Z-score .

Q: The lengths of human pregnancies are normally distributed with a mean of 268 days, and a standard…

A: Given that, X~N(268,152) n=10

Q: use this to find a 95% confidence interval for the mean height of all red maple trees

A: The sample size is n = 146 Sample mean = 59 And sample SD = 12 Since the sample size is large then…

Q: The gestation period for human births can be taken as normally distributed with a mean of 256 days…

A: Given: The gestation period for human births can be taken as normally distributed with a mean of 256…

Q: university in England and each student in a random sample of 38 female students from the same…

A: The following information has been provided: For Males : Sample Mean 1 (Xˉ1)(\bar X_1)= 282282…

Q: From the scores in subject statistics for 8 students, it was found that the mean score is 73 and the…

A: We have given that,  Sample mean (x̄) = 73,  standard deviation (s) = 5.15 and sample size (n) = 8…

Q: The gestation period for human births can be taken as normally distributed with a mean of 266 days…

A: Given:

Q: A group of 65 randomly selected students have a mean score of 30.6 with a standard deviation of 5.4…

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Q: Suppose the birth weights of babies in a particular country are normally distributed with a mean of…

A: Answer:

Q: If the number of dust particles in a square meter on a surface follows a Poisson distribution with a…

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Q: Suppose the scores of students on an exam are normally distributed with a mean of 454 and a standard…

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Q: Suppose you want to find if there is any diffference between the mean (average) lifetime of two…

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Q: A group of 10 surgery patients had a mean weight of 240 pounds with a sample standard deviation of…

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Q: The results of a common standardized test used in psychology research is designed so that the…

A: Given Population mean = 140 Population standard deviation = 40 Score =X= 44

Q: The scores in an intelligent test (IQ test) are known to be normally distributed with a  mean of 100…

A: Let X be the score of an IQ test.Given that, X is known to be normally distributed with a mean of…

Q: Can the standard deviation of a data set be zero

A: Standard deviation can not be negative.

Q: What is the z-score for this raw score?

A:

Q: The mean score of a random sample of 60 students is 145 with a standard deviation of 40. Find the…

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Q: Find the 90% confidence interval for the standard deviation of the lengths of pipes if a sample of…

A: given data s = 10.2 n = 22 90% CI for σ = ? α = 1 - 0.90 = 0.10df = n - 1 = 21χ2L = χ21-α2,n-1…

Q: Suppose the scores of students on an exam are normally distributed with a mean of 558 and a standard…

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Q: The results of a common standardized test used in physchology research is designed so that the…

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Q: Suppose the scores of students on an exam are normally distributed with a mean of 253 and a standard…

A: From the provided information, Mean (µ) = 253 Standard deviation (σ) = 80

Q: If X = average distance in feet for 49 fly balls, then give the distribution of X Round your…

A: Let X be distance to the outfield. It is known- X~N260, 402 sample size considered = 49 So, standard…

Q: 20 TV remote controls were followed over the years to find the mean lifespan of this model. The…

A: Answer - Here  n = 20 TV remote controls were followed  over the years to find the mean…

Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

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Q: The mean reading speed of a random sample of 81 adults is 320 words per minute. Find a 90%…

A: Given: n=81, x=320 and σ=45.   The value of z at 90% confidence level is 1.645. (From the z-table)

Q: Find the 95% confidence interval for the variance and standard deviation of the heights of maple…

A: Construct the 95% confidence interval for the variance. Obtain the critical values. The standard…

Q: The mean number of English courses taken in a two-year time period by male and female college…

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Q: 5 will be drawn from a population of test takers with a mean of 150 and standard deviation 9. Find…

A: Given that  Sample size (n) = 75 Population mean (μ) = 150 Standard deviation (σ) = 9   We know that…

Q: A sample of 36 corn plants represent the height of corn in a corn field. The sample mean of corn…

A: Parameters are the numeric characteristic of population. There are mainly two types of estimations…

Q: A sample of 30 NBA players had a sample mean of their heights as 80.5 inches. If the standard…

A: Given information Sample size n = 30 Sample mean x̅ = 80.5 inches Population standard deviation σ =…