A random sample of n = 9 scores is obtained from a normal population with µ = 40 and σ = 6. What is the probability that the sample mean will be greater than M = 43?​    0.3085​    ​0.6915    ​0.9332    ​0.0668

Q: sample of n = 4 scores is selected from a population with μ  = 100 and s = 20. If the sample mean is…

A: Given information: n = 4  μ  = 100  s = 20.  sample mean is M =110

Q: Suppose a random sample size of 60 is taken from a population with p= 0.51. The standard error of…

A:

Q: Suppose a random sample size of 60 is taken from a population with p = 0.51. What is the mean of…

A:

Q: You collect a random sample of 100 students and find that their average GPA is 3.2, with variance =…

A:

Q: A random sample of 64 is taken from a large normally distributed population with a mean μ=100 and…

A: Answer: From the given data, Mean μ = 100 Standard deviation σ = 15 For a sample size of n = 64

Q: For a normal population with µ = 100 and σ = 9, what is the probability of obtaining a sample mean…

A: According to the given information, we have Mean = 100 Standard deviation = 9 Sample size = 25

Q: Use the Normal approximation to find the probability that the sample proportion of heads is (a)…

A:

Q: If one score is randomly selected from a normal distribution with µ = 90 and σ = 20, the probability…

A: We have given that  The score is randomly selected from a normal distribution with µ = 90 and σ =…

Q: If one score is randomly selected from a normal distribution with µ = 22 and σ = 16, what is the…

A: We have:-   according to given question random  variable follows normal distribution as follows…

Q: The 7th percentile is

A: Here given , mean =  42 standard deviation =  6 X follow normal distribution with parameter mean =…

Q: If a score is selected at random from a normal distribution, the probability that it will be between…

A: According to the given information in this question we need to find the given probability

Q: A normal distribution has a mean of u = 87 with o = 6. If one score is randomly selected from this…

A: Given:  Random variable x from normal distribution with mean mu=87 amd standard deviations=6  Then…

Q: For a normal population with a mean of µ = 80 and a standard deviation of σ = 10, what is the…

A: Mean(µ)= 80standard deviation(σ) = 10

Q: For a normal distribution with a mean of u = 30 and o = 10, what is the probability of selecting an…

A: Given : A normal dist. with Mean (μ) = 30 Standard deviation (σ) = 10 Let X be a normal variable…

Q: Find the 2525 -th percentile for the standard normal random variable ZZ

A: For aa standard normal variable, mean is 0 and standard deviation is 1.

Q: A random sample of n = 25 scores is obtained from a normal population with µ = 30 and σ = 6. What is…

A: The sample size is 25, population mean is 30 and population standard deviation is 6. The probability…

Q: A sample of n = 10 scores has a mean of M = 3. What is ΣX for this sample?

A: Solution: From the given information, M=3 and n=10.

Q: Let x be a random variable that represents red blood cell (RBC) count in millions of cells per cubic…

A: Hypothesis testing is conducted for the parameters of the population like population mean,…

Q: N=15 scores has ΣX=120.

A: Given, N=15 ∑X=120

Q: Suppose X∼N(8,1.5), and x=5. Find and interpret the z-score of the standardized normal random…

A: The given information is that the random variable X follows normal distribution with mean 8 and…

Q: A normal distribution has μ = 368 and σ = 42.When samples of n = 36 are taken: What is the expected…

A: A normal distribution follows a bell shaped curve which is centred at the mean and it is also called…

Q: A random sample of n = 9 is obtained from a normal distribution with μ= 40 and σ=15. What is the…

A:

Q: A normal distribution has µ = 20 and σ = 4. Which is the probability of randomly selecting a score…

A: Given that.   X~N( μ , ?^2 )   μ=20   , ?=4   Z-score =( x - μ )/?

Q: A population of N = 6 scores has ΣX = 42. What is the population mean?

A: Given ,Population of N=6 scoresand Σx =42

Q: A sample of n = 36 scores is obtained from a population with u = 100 and o = 24. If the sample mean…

A: GivenMean(μ)=100standard deviation(σ)=24sample size(n)=36sample mean(M)=104

Q: random sample of n= 4 is obtained from a normal distribution µ= 30,         σ= 8.  What is the…

A: A random sample of n=4 is obtained from normal distribution with µ=30 and σ=8. i.e. X~N(µ=30, σ2=82)…

Q: sample of n =16 is selected from a normal population with M = 50, σ= 20. What is the probability of…

A: Given data Sample size = 16 Mean = 50 Standard deviation = 20 probability of obtaining a sample mean…

Q: A random sample of n = 9 scores is selected from a normal distribution with μ = 80 and σ = 12. What…

A:

Q: A sample of n = 36 scores is selected from a normal population with µ = 75 and σ = 7. The…

A: The sample size is 36, population mean is 75 and population standard deviation is 7.

Q: What is the probability of randomly selecting a score with a value greater than X = 63 from a…

A: Given,Mean (μ) =60Standard deviation (σ)=12And X=63

Q: normal distribution has a mean of u= 28 and o= 4. If one score is randomly selected from the…

A: Given that  A normal distribution has a mean of u= 28 and o= 4.  By using standard normal…

Q: If random samples, each with n = 16 scores, are selected from a normal population with µ = 100 and σ…

A: Here, the known values are n = 16 scores, µ = 100 and σ = 20.

Q: What is the probability of sampling a score of    X = 55 or greater from a population with μ = 50…

A: Given: μ = 50 σ = 15 Thus, X ~ N(μ = 50, σ = 15)

Q: A random sample of n = 4 scores is obtained from a normal population with u = 30 and o = 8. What is…

A: A random sample of n = 4 scores is obtained from a normal population with u = 30 and σ =  8.

Q: Consider a normally distributed population of scores with a mean μ = 100 and σx = 10. What score has…

A:

Q: If all the possible random samples with n = 36 scores are selected from a normal population with µ =…

A: Identify the correct option for the average of all the sample means. The correct option is…

Q: Two samples, each with n = 16 scores, produce an estimated standard error of 4 points and a t…

A: According to the provided information, n=16 SE = 4  t = 2

Q: A sample of n = 16 scores is obtained from a population with μ = 70 and σ = 20. If the sample mean…

A: The sample mean also follow normal distribution with following parameters