A company claims that the mean monthly residential electricity consumption in a certain region is more than 870 kiloWatt-hours (kWh). You want to test this claim. You find that a random sample of 60 residential customers has a mean monthly consumption of 900 kWh. Assume the population standard deviation is 126 kWh. At a=0.05, can you support the claim?  i) Identify Hoand Ha. ii) Identify the rejection region(s) iii) Find the standardized test statistic. iv) Decide whether to reject or fail to reject the null hypothesis. v) Interpret the decision in the context of the original claim.

Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: Since, you have you have posted a question with multiple subparts we will solve first three subparts…

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Q: Total plasma volume is important in determining the required plasma component in blood replacement…

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Q: Total plasma volume is important in determining the required plasma component in blood replacement…

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Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: a) Followings are the Explanation of the question

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Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: The sample size is 42, sample mean is 37.5 and population standard deviation is 7.60.

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Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: Given, n=40 X=37.5σ=7.80

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Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: n=50X¯=37.5 ml/kgσ=7.00 ml/kgα=0.01

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Q: A food manufacturer claims that eating its new cereal as part of a daily diet lowers total blood…

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Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: Given Information: Sample mean (x) = 37.5 ml/kg Standard deviation (s) = 7.20 ml/kg Margin of error…

Q: Total plasma volume is important in determining the required plasma component in blood replacement…

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Q: Total plasma volume is important in determining the required plasma component in blood replacement…

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A: Given Information: Sample size n=40 Sample mean x¯=37.5 Population standard deviation σ=7.80…

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Q: otal plasma volume is important in determining the required plasma component in blood replacement…

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Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: Solution: From the given information, confidence level is 0.99, σ=7.80 and E=2.90.