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Two researchers conducted a study in which two groups of students were asked to answer 42...

Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. The students in group 1 were asked to spend 5 minutes thinking about what it would mean to be a​ professor, while the students in group 2 were asked to think about soccer hooligans. These pretest thoughts are a form of priming. The 200 students in group 1 had a mean score of 22.9 with a standard deviation of 4.1​, while the 200 students in group 2 had a mean score of 18.4 with a standard deviation of 3.5.

Determine the 95​% confidence interval for the difference in​ scores, μ1−μ2. Interpret the interval.

The lower bound is ?

The upper bound is?

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