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Assume that a stress assessment score is normally distributed with a = 74 and = 6. It is a common belief that students in dental

Assume that a stress assessment score is normally distributed with a = 74 and = 6. It is a common belief that students in dental schools have higher stress level. A sample of 25 dental students is randomly selected and its x = 75.8. Assume = .05. Do dental students have higher level stress than 74? Please show work, and the four-step hypothesis test.

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