A random sample of size n is to be drawn from a population with u=600 and sigma=100. What size sample would be necessary in order to ensure a standard error of 10?

Q: In a Z-test, the number of degrees of freedom is A none of these B 1 C) n-1 D n-2

A: AS PER GUIDELINE EXPERT HAVE TO ANSWER FIRST QUESTION ONLY.  SOJCE I HAD DONE ALL FOR YOU.  AND ALL…

Q: A population has a mean of 200 and a standard deviation of 50. Suppose a simple random sample of…

A: Given,Population mean (μ) = 200Population standard deviation (σ) = 50Sample size (n) = 100.We know…

Q: A random sample of 52 measurements was selected from a population with σ=3.6. The sample mean was…

A:

Q: A population has a mean of 400  and a standard deviation of 80 . Suppose a sample of size 100  is…

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

Q: For a population with phi = 16 , how large a sample is necessary to have a standard error that is…

A:

Q: Assume a population of 2, 3, and 10. Assume that samples of size n=2 are randomly selected with…

A: The given population dataset is:

Q: We want to estimate a population mean u of a population with a standard deviation s=12. What size…

A: We have given that,  Population standard deviation (σ) = 12, confidence interval (c.i) = 95% = 0.95…

Q: or a population with σ = 12, how large a sample is necessary to have a standard error that is less…

A: The population standard deviation is, σ=12 The standard error is, Use the standard error, the…

Q: A sample of n=24 is selected from a population = 120 and σ = 40.  If the sample mean is 130, what is…

A: It is given that the population mean, μ=120 and standard deviation, σ=40. For the sample size of 24,…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 23 for the population…

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Q: The waiting times​ (in minutes) of a random sample of 20 people at a bank have a sample standard…

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Q: A sample of 11 circuits from a large normal population has a mean resistance of 2.20 ohms. We know…

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Q: A survey is conducted to determine if there is a difference in the proportion of students, parents,…

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Q: n a simple randon sample size of 89, there were 40 individuals in the category of interest. It is…

A: Answer - In a simple random sample size n =  89, there were x = 40 individuals in the category of…

Q: Random samples of size 25 are taken from an infinite population whose mean is 160 and standard…

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Q: A sample of 20 items provides a sample standard deviation of 4. a. Compute the 90% confidence…

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Q: If all other values are held constant, what happens to the value of t when sample size increases ?

A: The formula to calculate t value (test statistic) can be written as:

Q: ne that you conducted a single-sample t test with 8 participants. For a

A: Where, n=number of observations α = level of significance

Q: What was the z-score for 0.3274? What is σp′?

A: suppose that 43% of people who enter a store will make a purchase. Random samples of people who walk…

Q: For a population with o = 12, how large a sample is necessary to have a standard error that is less…

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Q: A random sample of size, nA = 3 is selected from population A, which has a standard deviation of 6.…

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Q: Given that we have a mass "x" (in grams) of a certain object and it will be estimated using the…

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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.