A random variable X following normal distribution with mean 45 and standard deviation 8. For a random of sample of 16 observations, find the standard error?

Q: what is the sample standard deviation?

A:

Q: A population has a mean μ = 77 and a standard deviation σ = 22. Find the mean and standard deviation…

A: Mean()=77standard deviation()=22sample size(n)=264

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: Using Chebyshev’s theorem, solve these problems for a distribution with a mean of 80 and a standard…

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Q: population has a standard deviation of 18 on average how much difference should exist between the…

A: A population has a standard deviation of 18.

Q: Which is true of the distribution of the sample mean?

A: Here given sample of size 20 is taken from a population with a normal distribution and unknown…

Q: A sample of size 50 from a normal distribution has sample mean 5 and sample variance 20. Find 96%…

A: To find the confidence interval for the variance, we need to use the Chi-squared distribution. The…

Q: A random sample of size, n=20 has the mean 20 and standard deviation 5. What is the coefficeint of…

A: Given Information: Sample size (n) = 20 Sample mean (x¯) = 20 Sample standard deviation (s) = 5 To…

Q: A population has a mean μ=84 and a standard deviation σ=21. Find the mean and standard deviation…

A:

Q: Compute the standard score (Z-score) for x, when x = 40, the mean of the distribution = 50, and the…

A:

Q: The standard deviation of a distribution is hypothesized to be 50. If an observed sample of 16…

A:

Q: Given a standard error of 5.2 with a sample size of 9. Then the standard deviation is

A: Solution: 4. From the given information, a standard error is 5.2 and n=9.

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: The weights of students are normally distributed with mean 58 and standard deviation 2.4. For a…

A: Answer: Using the given data, Population mean = μ = 58 Population standard deviation = σ = 2.4

Q: For a sample with M = 90, a score of X = 88 corresponds to z = -1.00. What is the sample standard…

A: Solution-: Given: M=90, X=88, z=-1 We want to find the sample standard deviation?​

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

A:

Q: A simple random sample of 40 items resulted in a sample mean of 25. The population standard…

A: Givensample size(n)=40sample Mean(x)=25standard deviation(σ)=5

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: A sample of n=4 has test scores of 0, 0, 12, 12 What is the range, the variance and the standard…

A: Given information- Sample size, n= 4 Given test scores are- 0, 0, 12, 12 We know that- Range =…

Q: If you have a population standard deviation of 10 and a sample size of 4, what is your standard…

A: Given,population standard deviation(σ)=10sample size(n)=4

Q: A population has a mean of μ = 87 and a standard deviation  = 24 find the mean and standard…

A:

Q: ize 400 is taken from a population with a mean of 610 and a standard deviation of 15. Find the…

A: Given, n=400 Mean (μ) = 610 Standard deviation (σ) = 15

Q: A population is normally distributed with a mean of 25 and a standard deviation of 3. What is the z…

A: GIVEN DATA,μ=25σ=3X=18z=?

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 computer chips real size average is 1cm and its standart deviation is 0.1cm and it has normal…

A: Introduction :-  Here random variable is normally distributed. we have to find the point above which…

Q: What are the mean and the standard deviation for the sampling distribution of the sample proportion?

A: Given that, Sample size (n) = 100 Population proportion (p) = 0.60 q = 1-p = 1-0.60 = 0.40 To find…

Q: A population has a standard deviation of 18 on average how much difference should exist for a random…

A: From the provided information, Population standard deviation (σ) = 18 Sample size (n) = 36

Q: A population has a mean μ=81 and a standard deviation σ=6. Find the mean and standard deviation of…

A: From the provided information, Mean (µ) = 81 Standard deviation (σ) = 6 X~N (81, 6)

Q: If the standard error of the mean is σx̅ = 3 and the sample size is n = 64, then the population…

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Q: large population of 5,000 students take a practice test to prepare for a standardized test. The…

A: Population mean, Population standard deviation,

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

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

A: