A scale measuring confidence in the media was administered to a random sample of politically-affiliated Americans, with higher scores indicating greater levels of confidence. A sample of 26 Democrats had a mean score of 8.2 on the scale with a standard deviation of 1.5. A sample of 24 Republicans scored an average of 7.8 with a standard deviation of 1.1. Is there a significant difference between Democrats and Republicans regarding confidence in the media? Conduct a significance test with alpha = .05. With an alpha of .05, what is the critical score? What is the obtained score?

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A: Solution We have given The null and alternative hypothesis H0: μ=10.7    H1:μ≠10.7

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A: Given : population mean , μ = 98.6

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A: Confidence interval is an interval such that the probability of the unknown parameter to be included…

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Q: Two researchers conducted a study in which two groups of students were asked to answer 42 trivia…

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A:

Q: Two researchers conducted a study in which two groups of students were asked to answer 42 trivia…

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A: State the hypotheses.

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Q: Do political science classes require the same amount of writing as history classes? The 40 randomly…

A:

Q: Two researchers conducted a study in which two groups of students were asked to answer 42 trivia…

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Q: Two researchers conducted a study in which two groups of students were asked to answer 42 trivia…

A: Given that

Q: Two researchers conducted a study in which two groups of students were asked to answer 42 trivia…

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A: