Suppose x has a distribution with a mean of 90 and a standard deviation of 27. Random samples of of size n =36 are drawn.     Find the z value corresponding to x =85.5

Q: For a normally distributed population with a mean of 40 and a standard deviation of 5 find P(38 < X…

A: Given Information: Required : To find P(38 &lt; X &lt; 41) Z-score is a measure which indicates…

Q: Suppose that a distribution of 400 items has mean 130 and standard deviation 5. Find the​ z-score of…

A: Given that.   X~N( μ , ?)   μ=130     , ?=5  , x=143   Z-score =( x - μ )/?

Q: The mean is u: = and the standard deviation is o: =

A: Given,

Q: If the population standard deviation of a normal distribution is 2.8, then find the standard…

A: Answer: From the given data, Population standard deviation = 2.8 number of observations = 68

Q: A random sample of 120 students has a test score average deviation of 11.4 find the margin of error…

A:

Q: Suppose x has a distribution with a mean of 13.9 and a standard deviation of 2.1. Random samples of…

A:

Q: For a population with a standard deviation of 40, how large a sample is necessary to have a standard…

A: We want to find the sample size

Q: Find the X value corresponding to z = +0.75 for a distribution with population mean of 90 and…

A: Solution: From given information, µ=90, σ=12 and z=0.75.

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: For a normally distributed population with a mean of 40 and a standard deviation of 5 find P(38 < X…

A: Here given that a normally distributed population with a mean of 40 and a standard deviation of 5.…

Q: f X is normally distributed with a mean of 42 and a standard deviation of 4, determine the interval…

A: given data, normal distribution,μ=42σ=4CI=0.95α=1-0.95=0.05

Q: A population has a mean μ=147 and a standard deviation σ=30. Find the mean and standard deviation of…

A: The mean of the sampling distribution of sample means: Plug in all the values in the formula, we…

Q: A population has a mean μ=83 and a standard deviation σ=2424. Find the mean and standard deviation…

A: Given dataMean μ=83Standard Deviation σ=24Points on sampling distribution of the sample mean:If the…

Q: Suppose speeds of vehicles traveling on a highway have an unknown distribution with mean 63 and…

A: Given that the speeds of vehicles traveling on a highway have an unknown distribution with Mean(µ) =…

Q: ppose x comes from a distribution where the mean is 151 and the standard deviation is 22. Suppose a…

A: Population mean =151Population standard deviation =22Sample size n =63

Q: Suppose x comes from a distribution where the mean is 151 and the standard deviation i 22. Suppose a…

A:

Q: A population has a mean u = 130 and a standard deviation o = 26. Find the mean and standard…

A:

Q: Suppose IQ scores of students at Bradley follow a normal distribution with a mean of 103 and a…

A: Calculate the IQ score for the top 2.5% of all IQ's at this college.

Q: A sample of size 60 will be drawn from a population with mean 31 and standard deviation 6 .Find…

A: Given that.   X~N( μ , ?)   μ=31     , ?=6   Z-score =( x - μ )/?

Q: Suppose X be a normally distributed random variable with unknown mean μ and a standard deviation of…

A:

Q: A population has a mean μ=169 and a standard deviation σ=21. Find the mean and standard deviation…

A: Mean()=169standard deviation()=21sample size(n)=46

Q: Suppose that the average number of hurricanes heading to RGV is 32 per year witha standard deviation…

A: It is given that the, Hurricanes heading follows the normal distribution with the average number of…

Q: Find the standard error of the sample mean such that we have 50 random samples with mean 30 and…

A: Number of random samples,  Mean=30 Standard deviation,

Q: A population is known to be normally distributed with standard deviation known to be 6.9. In order…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: A random sample of 10 subjects have weights with a standard deviation of 10.6705 KG. What is the…

A:

Q: A sample of n=25 scores has a mean of 68. Find the z-score for this sample:   If it was obtained…

A:

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5 find P(X <…

A:

Q: Suppose that x is normally distributed with a mean of 20 and a standard deviation of 15. What is P(x…

A: given data, normal distribution, μ=20σ=15p(X≥55.40)=?

Q: Suppose x has a distribution with a mean of 90 and a standard deviation of 27 Random samples of size…

A: Given mean, μ=90 standard deviation, σ= 27 n =36 X ~ N(μ, σ)

Q: A given distribution has a population meanof 129 and a population standard deviation, of 12. What…

A: Mean = 129 Standard deviation = 12 Raw score, X = 75

Q: A population has a mean μ=85 and a standard deviation σ=28. Find the mean and standard deviation…

A:

Q: A population has a mean μ=79 and a standard deviation σ=21. Find the mean and standard deviation…

A:

Q: Suppose that a distribution of 300 items has mean 115 and standard deviation 4. Find the z-score of…

A: Given, mean (μ) = 115 standard deviation (σ) = 4 x = 121

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

A:

Q: Suppose x has a distribution with a mean of 13.9 and a standard deviation of 2.1. Random samples of…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.