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What kind of test? A company wants to determine if the average salary of their employees is significantly different from the national average. National average

What kind of test? A company wants to determine if the average salary of their employees is significantly different from the national average. National average is 30$ hourly with a standard deviation of 5$. You pulled a sample of 250 people with the average of 35$ per hour and standard deviation of 10$. Test your hypothesis using alpha = .05.

Zobt = 15.8.

Tobt = 7.91.

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