If μ= 39.44 and σ=3, what is the critical value for the 95% interval when x̄=40 with sample size n=182?

Q: Given the population mean, mu = 10,321, and a population standard deviation sigma = 736, for a…

A: Introduction: The sampling distribution of the sample mean, X̄, based on a sample of size n, taken…

Q: State the conclusion for this hypothesis test. OA. Do not reject Ho. There is not sufficient…

A: The level of significance is 0.1 and the p-value is 0.472.

Q: By how many times does the sample size have to be increased to decrease the margin of error by a…

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Q: If x is a normally distributed variable with µ = 100 and σ = 5, find the lower and upper x values…

A: Let X is normally distributed with mean µ and standard deviation σ.  Let α be a significance level…

Q: Suppose you could take all possible samples of size n = 25 from a Normal population with mean μ = 50…

A: Given that a sample of size n = 25 is drawn from a normal population with mean μ = 50 and σ = 5.

Q: A population has a mean μ=136 and a standard deviation σ=30. Find the mean and standard deviation of…

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Q: a) What is the setup for your null and alternative hypothesis? b) What is the value of the test…

A: Here AS PER POLICY I HAVE CALCULATED 3 SUBPARTS PLZ REPOST FOR REMAINING PARTS WITH NOTE I NEED…

Q: A process control engineer wishes to estimate the true proportion of defective computer chips by…

A: Given: margin of error Me = 0.0001 Confidence level = 90% Significance level α = 1-0.90 = 0.10 True…

Q: A population has a mean μ=164 and a standard deviation σ=24. Find the mean and standard deviation of…

A: The mean is 164, the standard deviation is 24 and the sample size is 47.

Q: For a population with µ = 60 and σ = 20, the Sampling distribution of the Mean, based on n = 16 will…

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Q: For a two-talled test at 86.12% conndence with known population variance, the critical value of the…

A: Solution : Given : Confidence level = 86.12% and population variance is known. When population…

Q: If the population variance of the lifetime of a light bulb is 10000 hours, how large of a sample…

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Q: Find the test statistic for this hypothesis test. 2o = (Round to two decimal places as needed.)

A: It is given that x =258 and n =450.

Q: When a sample size from the population is n=1 than the standard error will always equal the

A: Given, Sample size from the population is n = 1

Q: Assume that IQ scores are normally distributed with μ = 100 and σ = 15 What percent of IQ scores…

A: The normal distribution is the most useful theoretical distribution for continuous variables.  For…

Q: If X is a normal variate with mean 5 and variance 4. Find P ( -1.5 < X < 2)?

A: Given,mean(μ)=5standard deviation(σ)=2

Q: 5. If you want to be 85% confident of estimating the population mean sampling error of +5 and the…

A: At 85% confidence level, the z value is 1.44 which can be obtained by using the standard normal…

Q: A population has a mean μ=83 and a standard deviation σ=8. Find the mean of a sampling distribution…

A: Given data,  μ=83  σ=8  n=64

Q: In each situation, find the value of the t-statistic for the sample mean x and give the value of…

A: (a) t = -1.25df = 24  (b) t = 1.25df = 24 Explanation:To calculate the t-statistic and degrees of…

Q: If x is normally distributed variable with μ = 85 and sigma = 4, find the lower and upper x values…

A: From the provided information, Mean (µ) = 85 Standard deviation (σ) = 4 X~N (85, 4)

Q: The results of a study that used an independent samples t-test was t(28) = 2.14, p = .01. Based on…

A: t(28) means that degree of freedom  = 28 Now, degree of freedom for a t-test one sample case  = n-1.

Q: Construct the 90% interval estimate for the ratio of the population variances usi

A: Constructing  the 90% interval estimate for the ratio of the population variances using the results…

Q: If the population variance of the lifetime of a light bulb is 10000 hours, how large of a sample…

A: Given: The population variance of the lifetime of a light bulb is 10000 hours, and a sample must be…

Q: A small amount of the trace element selenium, from 50 to 200 micrograms (ug) per day, is considered…

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Q: The sum of the squared deviation scores is SS = 20 for a sample of n = 6 scores. What is the…

A: The variance of the sample can be calculated as:

Q: If a variable X is normally distributed with mean equals 22 and variance equals 441, then what is P…

A: From the provided information, Mean (µ) = 22 Variance (σ2) = 441 Standard deviation (σ) = √441 = 21…

Q: A population has a mean of μ = 87 and a standard deviation  = 24 find the mean and standard…

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Q: Suppose you could take all possible samples of size n = 25 from a Normal population with mean μ = 50…

A: Given : μ = 50 , σ= 5 and n= 25

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

A: Given:  n = 9  µ= 80 σ = 18

Q: Suppose we want to test H0: μ ≥30  versus  H1: μ < 30.H0: μ ≥30  versus  H1: μ < 30. If we do not…

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Q: A population of N = 6 scores has ΣX = 42. What is the population mean?

A: Given ,Population of N=6 scoresand Σx =42

Q: If all 24 samples from a population produce the same age x = 20, what are the sample meanµ and the…

A: All 24 samples from a population produce the same age x=20. That is each xi=20 then

Q: Suppose we have a population with mean μ and standard deviation σ. If we take a random sample of…

A: From the provided information, We have a population with mean = μ  Standard deviation = σ

Q: Can the population support of samples completed ? (margin of error =5%) (Z=1.96,p=0.6)

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Q: If a random sample of size n = 100 is selected from a population with mean μ = 200 and standard…

A: The standard deviation of the sample mean is given by the formula: σx̄ = σ/√n Plugging in the given…

Q: Consider a normally distributed population of scores with a mean μ = 100 and σx = 10. What score has…

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