Determine the minimum sample size required when you want to be 90​% confident that the sample mean is within one unit of the population mean and σ=10.4. Assume the population is normally distributed.

Q: Let X, , X, be a random sample from a Normal distribution with mean u and variance a. Given that the…

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Q: Assume that the data has a normal distribution and the number of observations is greater than fifty.…

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Q: Given X follows Normal distribution N( 50,10)  What value of X has a z score of 1.4? Select one:…

A: We have given that  X~N(mu, sigma) mu=50 ,sigma=10 and Z-socre =1.4

Q: since critical values of t vary by sample size, before using the t table we must first calculate a.…

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Q: Area .3521 Z= 4. In a sampling distribution, as n increases what happens to the standard deviation…

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Q: Q.2. The mean and the standard deviation of the breaking load in experiments performed on 25…

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Q: Assume that the distribution of X is N(H, 10.89). Find the sample size so that we are 90% confident…

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Q: for a normal population mean with SD= 1.4, if a sample of size 25, mean= 9.8. Then The 95% one-sided…

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Q: A normal population has a mean 100 and variance 25. How large must the sample size be if we want the…

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Q: Samples of size n=9 are selected from a population with u = 80 with ở = 18. What is the standard…

A: The standard error for the distribution of the sample means.

Q: Assume that a simple random sample has been selected from a normally distributed population.  Test…

A: Solution : = 145 = 150 s =13.6 n = 40

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Q: Consider a normal population with u = 42 and o = 4.7. Calculate the z-score for an x of 48.6 from a…

A: Reviewing information, Given,μ=42σ=4.7X¯=48.6n=29

Q: Assume that the distribution of X iS N(u, 10.89). Find the sample size so that we are 99% confident…

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Q: f. A random sample of n= 80 observations from a quantitative population produced I = 30.2 and s? =…

A:

Q: The number of successes and the sample size are given for a simple random sample from a population.…

A: Solution: Given information:  n= 30 Sample size  x= 13 successes p^=xn=1330=0.4333 Sample proportion…

Q: Given a normal distribution with MEAN = 40 and SD= 6, find the value of x that has (a) 45% of the…

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Q: Draw all possible samples each of size 2 from the population 2, 4, 6 and 8 using sampling with…

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Q: Let x be a random variable that has a distribution with mean μ = 150 and standard deviation σ =…

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Q: A population has parameters u = 94.8 and o = 196. 10.7. You intend to draw a random sample of size…

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Q: Assume that there is a sampling distribution of x of size 34 and they are selected at random from a…

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Q: Some fruit are sold whose weights follow a normal distribution such that X-N(90, 16) If the heaviest…

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Q: Determine the minimum sample size required when you want to be 90% confident that the sample mean is…

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Q: Estimate the process standard deviation using information from the following process with average…

A: We know that an estimator of process standard deviation is given by; σ^=R¯d2where;d2 is a constant…

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.