Q13. What happens to the standard error of an estimate when the sample size in a random sample SRS) decreases? a. the standard error decreases B. the standard error increases C. the standard error stays the same D. none of the above

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Q: Find the z-score having area 0.86 to its right under the standard normal curve; that is, find Zo.-…

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Q: What is the probability that a randomly selected payment is between $880 and $1140

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Q: 16.  A sample mean, sample standard deviation, and sample size are given. Use the one-mean t-test to…

A: Given,sample mean(x¯)=7.1sample standard deviation(s)=2.3sample size(n)=18degrees of…

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A: Given ,  Sample mean = x¯ =85 population standard deviation = σ = 7  Sample size = n = 20 Claim :…

Q: A sample of 55 eggs yields a mean weight of 1.76 ounces. Assume that population standard deviation…

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Q: In a random sample of 18 people, the mean commute time to work was 32.2 minutes and the standard…

A: Given that n =18,x¯=32.2,s=7.1,α=0.10

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A: Given  A binomial distribution, we need to explain how we are getting the terms 1,6,15,20 and so on…

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A: The following data has been given: 10,7,9,3,8,15,5,5,12

Q: of obtaining a sample mean of 68 or less from a sample of 35?

A: Population mean is 65 and standard deviation equal to 24 μ=65σ=24 Sample size is 35; n=35 Cumulative…

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Q: are vegetarian is 0.078. Find the margin of error for a 99% confidence interval.

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A: Given data n=100 mean=41.25 standard deviation=1.45

Q: For a standardized normal distribution, determine a value, say zo such that the following…

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Q: Use the normal approximation to the binomial to find the probability for  =n=50, p0.6,  and  =X36…

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A: Given data is x y 2 13.65 3 10.04 4 11.13 5 6.82 6 5.61 7 5.7

Q: Use the normal approximation to the binomial to find the probability for  =n=51, p0.9,  and  ≤X40…

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A: x y MONTH ADVERTISING $ SALES $ March 900 56000 April 2700 89200 May 3150 98500 June…

Q: mean is 72 and standard deviation is 8 what is  P( x ≤ 72)

A: Given,mean(μ)=72standard deviation(σ)=8

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A: Please find the explanation below. Thank you

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Q: a) Find c. b) Find P(X ≤ 2Y). c) Find the marginal pdf for X and Y.

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Q: The proportion p of residents in a community who recycle has traditionally been 70% . A policy maker…

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Q: What is P {Y ≤ <}}? f(x, y) = { (4x + 2y) 3 0, ) 0≤x≤ 1,0 ≤ y ≤ 1 elsewhere

A: fxy(x,y)=4x+2y3,0≤x≤1,0≤y≤10,otherwise we have to find PY≤12

Q: The length of fish were measured at 3 different lakes.  Lake 1:  3.5, 4.2, 6.1, 5.2 Lake 2: 5.1,…

A: The given data is: Lake 1 Lake 2 Lake 3 3.5 5.1 5.6 4.2 6.2 7.1 6.1 5.3 2.4 5.2 2.1 4.1…

Q: Assume that a randomly selected subject is given a bone density test. those test scores are normally…

A: Let X be the random variable from standard normal distribution with mean (μ) = 0 standard deviation…

Q: A population has a mean μ = 88 and a standard deviation a=7. Find the mean and standard deviation of…

A: The mean is 88 and the standard deviation is 7.