Suppose x has a distribution with a mean of 70 and a standard deviation of 3. Random samples of size  n = 36  are drawn.   (a) Describe the  x distribution  and compute the mean and standard deviation of the distribution. x  has         distribution with  mean ?x =

Q: Assume that the results are normally distributed. Pedro took an exam in a class in which the mean…

A: The formula for z-score is z = x - μσ where μ is the mean and σ is the standard deviation.…

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ = 100 and standard…

A:

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Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

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Q: a sample of n=7 scores has the mean of M=16. One score in the population is changed from X=20 to…

A: The mean is 16 and the sample size n is 7.

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 11 for the population…

A: given data normal distributionμ = 100σ = 1195% ci E = 2 n = ?

Q: n has a mean of µ = 51 and a standard deviation of σ = 7 For this population, find the z-score…

A: Note: As per the guidelines, we are only allowed to solve three subparts, please post the other…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of​ adults, and those scores…

A: We have given that The IQ scores are normally distributed with  Mean(µ) = 100 and Standard…

Q: The amount of annual snowfall in a certain mountain range is normally distributed with a mean of 70…

A:

Q: After the random sample of n = 71 has been taken, you are asked to consider the behavior of the…

A: Given,the random variable X is said to follow the normal distribution..To know the distribution of…

Q: Assume that adults have IQ scores that are normally distributed with a mean of u = 105 and a…

A: Let "X" be the IQ score of adults.

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A: It is given that the sample size is 13, the mean score is 1198 and the standard deviation is 170.…

Q: The length of eels (in cm) in a river may be assumed to be normally distributed with a mean of μ=46…

A:

Q: A researcher finds that the mean income (in dollars per week) of a sample of people who live in a…

A: Given:

Q: The amount of annual snowfall in a certain mountain range is normally distributed with a mean of 75…

A:

Q: Round each z-score to the nearest hundredth. A data set has a mean of  x = 4079  and a standard…

A:

Q: On an exam with a mean of M=39, you obtain a score of X=35. Would you prefer a standard deviation…

A: Given that, Mean M =39 X=35, prefer a standard deviation of s= 2 or s=8:

Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

A: Given: μ = 1537 σ = 315 n = 4 Formula Used: z-score = X-μσ The value of z-score is unusual if, it is…

Q: A distribution of exam scores has a mean of μ=80. If your score is X = 74, which standard deviation…

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Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

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Q: 3. Customers arrive at a checkout counter in a department store according to a Poisson distribution…

A: Please note that as per our guidelines if multiple sub-parts are there in a question we can answer…

Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

A: Let "X be the standardized exam scores.

Q: 5. A recent study claims that the average age of murder victims in a small city was less than or…

A: Given Population mean μ=23.2, n=18, sample mean x̄=22.6, s=sample standard deviations s=2, level of…

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Q: t the residents of a local town reported sleeping an average of a=7.97 hours each night with a…

A: Given : sample mean= x̅ = 7.766 population mean=μ = 7.97

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Q: Suppose that the hemoglobin levels among healthy females are normally distributed with a mean of 14.…

A: Question: Suppose that the hemoglobin levels among healthy females are normally distributed with a…

Q: Round each z-score to the nearest hundredth. A data set has a mean of  x = 213  and a standard…

A: For a sample point x, the corresponding z-score is given by    z = (x - )/ Where,  = mean of the…

Q: amples of size 115 from Population 1 with mean 83 and standard deviation 14 and samples of size 90…

A: Given that    Population 1 Population 2 Sample size (n1) = 115 Sample size (n2) = 90 Mean =…

Q: Calcium levels in people are normally distributed with a mean of 9.4 mg/dL and a standard deviation…

A: It is given that the calcium levels in people are normally distributed with a mean of 9.4 mg/dL and…

Q: The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?

A:

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of​ adults, and those scores…

A: Suppose a random variable x, defines the IQ scores.

Q: A distribution of scores is approximately normal with a mean of 78 and a standard deviation of 8.6.…

A: We have givan normal distribution..