Let y be a random variable. In a population, μy = 139 and 50. Use the central limit theorem to answer the following questions. (Note: any intermediate results should be rounded to four decimal places) In a random sample of size n = 142, find Pr(<140). Pr(Y <140) = (Round your response to four decimal places)

Q: Single adults: According to a Pew Research Center analysis of census data, in 2012, 20% of American…

A: The provided information is  The sample proportion is p=0.20 The sample size is n=25 the unusual to…

Q: In the country of United States of Heightlandia, the height measurements of ten-year-old children…

A: Given problem is normal distribution Let X: Height of children Mean=μ=55.7 Standard deviation=σ=9…

Q: p. Find the probability that a randomly selected bag of marijuana sold on the street will have a THC…

A: Given that.   X~N( μ , ?^2 )   μ=9.1     , ?=1   Z-score =( x - μ )/?

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A: Simple pdf method and mean method are used.

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A: Given Sample size=n=150 Sample proportion=p^=0.88 Confidence interval=99%

Q: b. Calculate the 50th percentile. invNorm(.50, 28.7, 2.1) = 28.7 c. Calculate the 81st percentile.…

A: Given data: 28.7,2.1

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A: From the data, x x2 320 102400 320 102400 340 115600 340 115600 345 119025 345 119025…

Q: n the country of United States of Heightlandia, the height measurements of ten-year-old children are…

A: Given: Mean(μ)=53.8standard deviation(σ)=5.6 Z score : z=x-μσ

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A:

Q: Before changes to its management staff, an automobile assembly line operation had a scheduled mean…

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A:

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A: The option is D.

Q: Claim: >80; x = 0.01 Sample statistics: x=81.1, s= 3.1, n = 25

A: The claim is μ&gt;80;α=0.01x=81.1s=3.1n=25

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A:

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A: Given Mean=136.8 Standard deviations=107.5 Sample size=65

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A: Given data is f(x,y) y 1 2 3 Total x 1 0.10 0.05 0.02 0.17 2 0.10 0.35 0.05 0.50 3 0.03…

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A: We need to answer, Under what circumstances can a very small treatment effect be statistically…

Q: The level of significance chosen for hypothesis testing is based on and topp god mog nir

A: The level of significance chosen for hypothesis testing is based on .......?

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A: here given  sample mean  = x¯ =  32.3 months populationn standard deviation  =  σ  = 45 sample size…

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Q: S The age of professional racecar drivers is normally distributed with a mean of 28 and a standard…

A:

Q: Which of the following hypotheses will require a two-tailed test? Women are more concerned with the…

A: Sol:- Two tailed test Hypothesis can be modeled as :-H0: μ = μ0Ha: μ ≠ μ0 Correct choice :-

Q: estions on a our gender? Male Fema times have you cheated on 1 or 2 times 3 or more able of observed…

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Q: part D E F

A: Sample size n = 25 Formula Used: Confidence interval = X ± tsn

Q: 2. Let X denote the reaction time, in seconds, to a certain stimulus and Y denote the temperature…

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Q: part D E

A: Given information: Treatment 1 Treatment 2 435.16 414.61 338.99 503.46 488.73 425.22…

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A:

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A:

Q: Q3: What type of test statistic is needed?

A: Here given , muzzle velocities of eight shells tested with new gunpowder . So here n = 8

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A:

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Q: A real estate agent suggests that the median rent for one- bedroom apartment in a community is $325…

A: From the provided information, Sample size (n) = 12 Level of significance (α) = 0.05

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A:

Q: A state-by-state survey found that the proport Alabama and Missouri was 24.7% and 28.7%, sample size…

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Q: A random sample of 20 recent weddings in a country yielded a mean wedding cost of $26,396.48. Assume…

A: The answer is attached below,

Q: The following table shows the number of active military personnel in 2009, by region (including the…

A: Given Information: Pacific 229,634 Mountain 89,816 West South Central 177,336 West…

Q: The numbers shown below are the means and ranges for eight samples. Each sample has three…

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A: