sample is selected from a population with mean ? = 99 and standard deviation ? = 10. For which of the sample sizes would it be reasonable to think that the x sampling distribution is approximately normal i

Q: If a population has a mean of 228.8 and a standard deviation of 35.5 then a sampling distribution…

A: Given that, mean is 228.8 and standard deviation is 35.5. We will use z-standard normal…

Q: If n is large and you are given the sample standard deviation but it wasn't stated whether or not…

A: Central limit theorem: If the population is normally distributed then the sampling distribution is…

Q: About 11% of the total U.S. wheat crop is destroyed by jail. A random sample of 16 claims reported…

A: From the provided information, Sample size (n) = 16 Population mean (µ) = 11 Sample mean (x̅) = 13.2…

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

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Q: Out of 100 packages 150. Use your knowledge of normal distribution to estimate the average number of…

A: Given 68 out of 100 is 68% Vide the Empirical rule, also known as 68 - 95 - 99.7 percent rule stated…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population…

A: Givenstandard deviation(σ)=12Marign of error(E)=7c=99%α=1-0.99=0.01α2=0.005zα2=z0.005=2.5758   (from…

Q: The store manager took a random sample of 100 customers to determine whether or not the mean waiting…

A: What is the appropriate test to use for this problem? A. One sample z-test  What is the observed…

Q: Suppose heights of dogs, in inches in a city have an unknown distribution with mean 26 and standard…

A: Given that heights of dogs in inches have a unknown distribution with mean 26 and standard deviation…

Q: x represents a random variable with mean 144 and standard deviation 36, then the standard deviation…

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Q: Suppose that a study of elementary school students reports that the mean age at which children begin…

A: The provided information are: Population mean (µ) = 5.7 Population standard deviation (σ) = 1.2…

Q: Suppose that we randomly select a sample of 80 measurements from an infinite population having a…

A: 1) Given: Mean μ=30 Standard deviation σ=5 Sample size n=80

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: When variance is unknown (if the population is finite with mean When variance is unknown (if the…

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Q: During rush hour, the traffic speed on a busy highway is found to have mean 42 mph and standard…

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Q: If x represents a random variable with mean 125 and standard deviation 36, then the standard…

A: For a random sample of 81, X –bar follows normal with mean value of 125 and standard deviation of 4.…

Q: Suppose the  scores of students on an exam are normally distributed with a mean of 520 and a…

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Q: Which of the following is a correct statement? A The discrepancy between the sample and the…

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Q: Suppose a random sample of exponential random variables X1, ..., Xn is taken. Find the meanand…

A: Step 1:The sample mean, denoted by ˉXˉ, of a random sample of exponential random variables…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 17 for the population…

A: Givenstandard deviaion(σ)=17Margin of error(E)=4confidence level =…

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: 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: If x represents a random variable with mean 137 and standard deviation 35, then the standard…

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

Q: amdom variable with a mean =13.2 and standard deviation =5.6 Ramdom samples of fixed size n=12 are…

A: As the population distribution is normal, it can be said that the distribution of the sample with…

Q: Suppose that among the population of smartphone owners with 16GB of storage, the mean amount of…

A: From the provided information, Mean (µ) = 13 GB Standard deviation (σ) = 3 GB

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population…

A: We want to find the sample size (n)

Q: The GPAs of all 5540 students enrolled at a university have an approximately normal distribution…

A: The sampling distribution is the representation of all possible samples drawn from the large…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 18 for the population…

A: Given information- Population mean, µ = 100 Population standard deviation, σ = 18 Error = 4…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the population…

A: It is given that  Mean, μ = 100 Standard deviation, σ = 10 Margin of error, E = 3 Confidence level =…

Q: My research hypothesis is: Doctors who are extroverts make fewer than 12 serious medical errors per…

A: Given that, Sample size n=25 Sample mean x¯=15 Sample standard deviation s=10

Q: If  =p0.5  and the distribution of  p  is approximately normal, then the sample size must be at…

A: Given:p = 0.5 The sampling distribution of the sample proportion 𝑝̂ is approximately normal when np…

Q: Let X be the amount of time (in hours) the wait is to get a table at a restaurant. Suppose the cdf…

A: Given: C.D.F of X is:F(X)=0        x<0x249    0≤x≤71         x>7

Q: For men heights are normally distributed with a mean of 69 inches and a standard deviation of 2.8…

A: The random variable X is heights of the men. It is normally distributed. X~N(μ=69,σ=2.8) The sample…

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…

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Q: The gas mileage for a 2020 Toyota Prius hybrid vehicle is skewed to the left, with μ = 55 miles per…

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Q: An IQ test is designed so that the mean is 100 and the standard deviation is 16 for the population…

A:

Q: random sample of size 36 is taken from a population with mean µ = 17 and standard deviation σ = 6.…

A: According to the given information in this question We need to find the mean and standard deviation…

Q: If the standard deviation of the population is σ, the standard deviation of the sample 읊 where "n"…

A: given data population standard deviation = σn = sample sizestandard deviation of sample mean = σx¯we…