Full-time Ph.D. students receive an average salary of $12,837 according to the U.S. Department of Education. The dean of graduate studies at a large state university feels that Ph.D. students in his state earn more than this. He surveys 44 randomly selected students and finds their average salary is $14,445, and the population standard deviation is $1500. With 0.05, is the dean correct?

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The hypotheses are stated below The claim is The dean of graduate who studies at a large state unive... View the full answer