(a) A population of size 20 is sampled without replacement. The standard deviation of the population is 0.35. Find the minimum sample size that the standard error of the mean is no more than 0.15. (b) A sample of 30 masks was taken randomly from the production line. Assume the strengths of the marks follow a normal distribution. The strength of each specimen was determined, giving a sample standard deviation of 10 kN/m2. With equal probabilities in the two tails, find the 95% confidence interval for the standard deviation of the strengths.

Q: A population has parameters u = 20.2 and o = 10.4. You intend to draw a random sample of size n =…

A: From the above data  we are given that n =195μ = 20.2σ = 10.4

Q: A population has parameters μ = 248.1 and o = 31.5. You intend to draw a random sample of size n=…

A: Given data μ = 248.1σ = 31.5n = 141

Q: A sample of size n = 146 produced the sample mean of 22.5. Assuming the population standard…

A: Answer - A sample of size n = 146 produced the sample mean of μ =  22.5.           Assuming the…

Q: The voltage of a received signal is assumed to be normally distributed with standard deviation 0.16…

A: here we have to test  H0:μ=2 vsH1:μ≠2  x = output voltage  X~ N(μ,σn=0.046188)

Q: A population has parameters μ=134.3 and σ=62.4. You intend to draw a random sample of size n=210.…

A:

Q: A normal distributed population has parameters μ = 77.4 and σ = 17.9. If a random sample of size n =…

A: In the question, given that,The question's purpose is to determine the mean and St. dev of sample…

Q: The mean and standard deviation of a normally distributed population are 1,200 and 12, respectively.…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: A population has parameters μ = 180.7 and σ = 70.8 . You intend to draw a random sample of size n =…

A: It is given that the population mean is 180.7. The population standard deviation is 70.8. The sample…

Q: A population has parameters µ = 125.2 and o = 65.4. You intend to draw a random sample size n = 89.…

A: Here , We need to use the sampling distribution of sample mean.

Q: A test is made of H0 : ȝ = 44 versus H1 : ȝ > 44. A sample of size n = 80 is drawn, and x = 45. The…

A: It is given that  Mean(μ) = 44 Sample mean(x̅) = 45 Standard deviation(σ) = 25 Sample size(n) = 80

Q: A population has parameters μ=38.2 and σ=97.1. You intend to draw a random sample of size n=106.…

A:

Q: the sample standard deviation is determined to be S = 2.7, compute the test statistic. Round to…

A: s = 2.7 sigma = 2.4 n = 16

Q: A population has parameters μ=108.6μ=108.6 and σ=18σ=18. You intend to draw a random sample of size…

A: Sampling Distribution of a sample mean (x¯) ~ N(μx¯ , σx¯)

Q: A population has parameters = 245.2 and a 8.9. You intend to draw a random sample of size n = 80.…

A: μx=245.2,σx=8.9,n=80

Q: The final exam scores achieved by the population of students taking SOC 221 are normally distributed…

A:

Q: Consider a normal population with µ = 50 and σ = 6. A sample size of at least which size needs to be…

A: The population standard deviation is 6 and margin of error is 2 or less.

Q: A population has parameters μ=170.9 and σ=18. You intend to draw a random sample of size n=87n=87.…

A: The data is provided as follows:Population mean, Population standard deviation, Sample size,

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

A: Given data, μ=90σ=27n=36x=85.5z=?

Q: A population has parameters μ = 19.3 and σ = 80.9 . You intend to draw a random sample of size n =…

A: Given A population has parameters μ=19.3 and σ = 80.9. And we  draw a random sample of sizen =102

Q: A researcher wishes to see if the average number of sick days a worker takes per year is greater…

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.