The average mpg usage for a 2017 Toyota Prius for a sample of 7 tanks of gas was 43.5 with a standard deviation of 1.8. For a 2017 Ford Fusion, the average mpg usage for a sample of 7 tanks of gas was 39.9 with a standard deviation of 2.0.   Assuming equal variances, at α = .05, is the true mean mpg lower for the Ford Fusion?   (a-2) Calculate the tcalc. (Round your answer to 4 decimal places.)   tcalc  ____________    (b) Calculate the p-value using Excel. (Round your answer to 4 decimal places.)   p-value  ___________

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A: Given that, n1=65, x1=640, s1=122n2=75, x2=682, s2=169 The null and alternative hypothesis is,…

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Q: A random sample of 82 eighth grade​ students' scores on a national mathematics assessment test has a…

A: Solution: Given information: n= 82 Sample size  x = 280 Sample mean μ= 275 Population mean σ= 36…

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A: r=correlation=0.97 (2 decimal places)

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A: GivenMean(x)=104standard deviation(σ)=38sample size(n)=150confidence level=99%

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Q: A random sample of 88 eighth grade​ students' scores on a national mathematics assessment test has…

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Q: Unfortunately, arsenic occurs naturally in some ground water. A mean arsenic level of μ = 8.0 parts…

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Q: The average exam score is 63 with a variance of 33.  Your exam has a Z score of 0.96. What is your…

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Q: A fast food restaurant estimates that the mean sodium content in one of its breakfast sandwiches is…

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Q: Unfortunately, arsenic occurs naturally in some ground water.† A mean arsenic level of μ = 8.0 parts…

A: Given that, A mean arsenic level of μ = 8.0 parts per billion (ppb) is considered safe for…

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Q: The height (in inches) of male lecturers at MU is believed to be normally distributed with the mean.…

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Q: A random sample of 46 adult coyotes in a region of northern Minnesota showed the average age to be…

A: a) The level of significance is α = 0.01.

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A: Introduction: For a normally distributed random variable, X with mean μ, and standard deviation σ,…

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A: From the provided information, Sample size (n) = 15 Sample mean (x̅) = 126 Sample standard deviation…

Q: A random sample of 81 ninth grade student's scores on a national mathematics assessment test has a…

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Q: Have American males (AMs) gotten heavier over the last 20 years? A random sample 77 AMs in 2019 had…

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Q: The time it takes for a compact fluorescent bulb to reach full brightness is normally distributed…

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Q: Find the corresponding z-scores. Which baby weighs relatively more? Select the correct choice below…

A:

Q: Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and…

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