If we have a sample of size 9 with mean 58.43 and variance 15 from a normal population X with unknown variance, and a sample of size 13 with mean 73.64 and variance 30 from a normal population Y with unknown population variance, then, assuming X and Y are independent, what is the significance of this data as evidence that the true population variance of X is more than 20% lower than the true population variance of Y?

Q: If the standard Z value of a random Ferdin drawn from a normal distribution populason with an…

A: Given  Mean=mu=80 Variance=sigma^2=400 Z=1.2

Q: population variance

A: null hypothesis :there is no significance difference  in medicine relieves pain in 318 seconds…

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A: Given Data : 345 749 427 765 336 777 663 451 787 454 711 544 453 330 718 462 585 658…

Q: A researcher takes sample temperatures in Fahrenheit of 16 days from San Francisco (Group 1) and 22…

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Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

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A: The given summary statistics are as follows:

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A: Note: Since you have posted multiple independent questions in the same request, we will solve the…

Q: A researcher takes sample temperatures in Fahrenheit of 16 days from San Francisco (Group 1) and 22…

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Q: estimate of the variance of the population was found to be 15.0 From another sample of 14…

A: Given that  n1 = 25 , S12 = 15 , n2 = 14 , S22 = 9.7

Q: Suppose that we have disjoint normal populations A and B and we want to find the standard error…

A: Denote μ1, μ2 as the true averages of populations A and B, respectively.

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A: Given data:

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A: Given, r2=0.09

Q: The next seven questions refer to the following scenario: A random sample of 16 Porsche drivers…

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A: Given, A sample of 15 boys had variance 460 A sample of 13 girls had variance 1400

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A: As per guidelines we will solve first question only, please repost other questions for more answers.…

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Q: What is your test-statistic? tTest- O 2.058 O 2.508 O 2.805 2.850

A: Given Information: Porsche Driver: Sample size n1=16 Sample mean x¯1=50 Variance s12=9 Standard…

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Q: The next seven questions refer to the following scenario: A random sample of 16 Porsche drivers…

A: For the given data df =?

Q: the standard Z value of a 16-unit sample taken randomly from a normal distribution populason with an…

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Q: A teacher is interested in assessing whether or not there is the same amount of variance in the…

A: From the provided information, Sample variance of 15 boys (s12) = 460 Sample variance of 13 girls…

Q: Suppose that you want to perform a hypothesis test based on independent random samples to compare…

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