Suppose x has a distribution with a mean of 70 and a standard deviation of 20. Random samples of size  n = 64  are drawn.   (a) Describe the x distribution  and compute the mean and standard deviation of the distribution.           distribution with mean ?x =          and standard deviation ?x =  . (b) Find the z value corresponding to  x = 72.5. z =

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of​ adults, and those…

A: μ = 100σ = 15 X = 115

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:

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: We have to find correct option.

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

A: The following information has been given: Let X be a normally distributed random variable that…

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

A: Given information-We have given that adults have IQ scores that are normally distributed.μ= 105σ =…

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

A: Obtain the Z-score for the random variable X equals 129. The Z-score for the random variable X…

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: 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: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: To solve this problem, we need to find the 17th percentile (P17) of a normally distributed dataset…

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

A: We have given that the scores are normally distributed with mean 100 and standard deviation 15.

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.

Q: a: To solve for the Mean: Variance: Σfx H b. To solve for the Range: R=UL-LL d. To solve for the…

A:

Q: For a data set of the pulse rates for a sample of adult​ females, the lowest pulse rate is 36 beats…

A: We have given that Mean (x̅) = 78Standard deviations (s) = 22.6

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

A:

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: GivenMean(μ)=0standard deviation(σ)=1

Q: Round answers to 4 decimal places. Draw graphs and include functions 1. According to a study, the…

A: given data normal distributionμ = 66σ= 2.5x = height of individual

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

A:

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: Fluorescent lightbulbs have lifetimes that are normally distributed with a mean of 6.2 years and a…

A: Z = x-μσ~ N(0,1)

Q: The mean height of an adult giraffe is 17 feet. Suppose that the distribution is normally…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Derive mean of gamma distribution.

A:

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

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: . If X is a normally distributed random variable with a mean of 235 Find the standard deviation…

A:

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 area of the shaded region. The graph to the right depicts IQ scores of​ adults, and those…

A: GivenMean(μ)=100standard deviation(σ)=15

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..