Samples of size n = 9 are selected from a population with u = 80 with o= 18. What is the standard error for the distribution of sample means?

Q: A random sample of n=4 scores is selected from a population with mu=80 and standard deviation=20. On…

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Q: Suppose a variable x has population mean µ = 38.23 and standard deviation o = 2.78. Determine the…

A: The formula of the standard error is,

Q: Find a 95% confidence interval for the sample mean of Y = X̄12 + X̄22 when X̄'s are obtained from…

A: Given X¯'s are obtained from standard normal population.

Q: Consider the experiment of selecting a point at randomin a circle of radius 1.5, and let X be the…

A: All regions inside the circle have equal probability of having the point. Thus X~U(0,1.5). The p.d.f…

Q: when samples drawn from a population, which is positively distributed, with replacement and sample…

A: From the given information, Consider, X be the random variable which is positive distributed.…

Q: The population of heights of adult males is normally distributed. If we obtain a voluntary response…

A: Voluntary response sampling: In this type of sampling the subjects or the respondents voluntarily…

Q: A sample of 6400 cases is drawn at random from a large population. The Variance is 100. Calculate…

A: Sample size, n = 6400 Variance = 100 Standard deviation = VarianceStandard deviation = 100Standard…

Q: Let the mean of the chance sample drawn from a population whose variance is known as 16 and normally…

A:

Q: Suppose Y₁, Y2,, Yn is an iid sample from a Poisson(A) distribution, where > 0. Is Y a consistent…

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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: If random samples, each with n = 4 scores, are selected from a normal population with μ = 80 and σ =…

A: Given,   Sample size = 4 Mean = 80 Standard deviation = 10   The objective is to find the standard…

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

A: The mean is 13.9 and the standard deviation is 2.1, and the sample size is 49.

Q: A chain sampling plan is used with a sample size of 5 and a parameter i of 3. If lots have a…

A: The population is the who set of study that are used for study. From the population, the sample has…

Q: You are conducting a left-tailed test of a claim about a population mean when sigma is unknov with a…

A: Determine the critical value. The critical for the left tailed test is obtained below as follows:

Q: For a sample of size n = 15,  the critical z-score for 82% confidence is  (two-decimal accuracy,…

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

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Q: The mean and the variance of a sample of size 16 from normal population are 32 and 9, respectively.…

A:

Q: Samples of size n = 9 are selected from a normal population with µ = 80 with σ = 18. What is the…

A: Given that, Mean, μ = 80 Standard deviation, σ = 18 Sample size, n = 9

Q: for a normally distributed random variable X with mean of 177.15 and standard deviation of 4.95 a…

A: It is given that the mean is 177.15 and the standard deviation is 4.95.

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: When simple random samples are drawn from a population that is normally distributed, the sampling…

A: According to the definition of Central limit theorem, the sampling distribution of the sample means…

Q: Consider a random sample X1, X2, ....., X30 of size 30, drawn from a  normal distribution with µ=…

A: Consider a random sample X1, X2, ….., X30 of size 30, drawn from a normal distribution with mean (μ)…

Q: The test of equality of the variances between two normally distributed populations relies which has…

A: We have to find the distribution of random variable which is used in testing the equality of…

Q: Find the best critical region for testing H : 1 = 2, H:1 = 3 based on the sample drawn from a…

A: Answer: For the given data,

Q: The average length of “short hospital stays” for men is slightly longer than that for women, 5.2…

A:

Q: e, the normal distribution is used to approximate the sampling distribution of the sample proportion…

A: The sampling distribution of the sample proportion is approximately normal with at least 10 expected…

Q: A simple random sample of size n= 40 is obtained from a population with μ= 50 and σ= 4. Does the…

A: Given information- Sample size, n = 40 Population mean, μ = 50 Population standard deviation, σ = 4

Q: Find the sample size for the given standard deviation 10 and the standard Error with respect of…

A: Given: standard deviation, s=10standard error =3

Q: If the random sample of X1,…, Xn comes from the uniform (0, Ɵ) distribution, which of the following…

A: Given information: Given that the independent random variables X1, X2, … , Xn are uniformly…

Q: A sample of n = 25 scores is selected from a population with mu = 80 with sigma ^ 2 = 20 On average,…

A: Given information- Population mean, µ = 80 Population standard deviation, σ = 20 Sample size, n = 25…

Q: Show that for a random sample of size 100, drawn with replacement, the stand- ard error of sample…

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Q: normal distribution has a mean of u = 40 with o =4. What is the probability of sampling an…

A: We want to find the probability of sampling an individual with a score greater than 46

Q: A random sample of size 36 drawn from the population of a known mean of 50 and standard deviation of…

A:

Q: A simple random sample of size n=47 is obtained from a population with μ=55 and σ=9. ​(a) Does the…

A:

Q: A random sample of size 16 is to be taken from a normal population having mean 100 and variance 4.…

A: Sample size = 16 Mean = 100 Variance = 4

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 size 400 is taken from a population whose standard deviation is 16. Find the standard…

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Q: A sample of size 50 will be drawn from a population with mean 76 and standard deviation 14. Find the…

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Q: A random variable X has a mean of 10 and variance of 9 and is of unknown distribution. Find p (5 < X…

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Q: We draw a random sample of size 36 from a population with standard deviation 3.5. If the sample mean…

A: n = 36 s = 3.5 xbar = 27

Q: 15. If the random variable X is distributed through the Normal distribution with mean = µ and…

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Q: Suppose a simple random sample of size  n = 50 is obtained from a population whose size is N =…

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Q: For a normal population with µ = 60 and σ = 50, the distribution of sample means based on n = 25…

A: Given that, Mean = 60 Standard deviation = 50 Sample size = 25

Q: Suppose two independent random samples of size n1 = n2 = 10 are from a normal population. Assume the…

A: From the given information, n1=n2=10 numerator degrees of freedom=10-1=9 Denominator degrees of…

Q: Find the mean, standard deviation of the sampling distribution of the means. Sample of size n were…

A: We have given that Mean(µ) = 25Variance(σ2) = 6.25  Sample size (n) = 25

Q: A random sample of size 16 is taken from a normal distribution with population variance 2.56 and…

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.