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Question 1. Staff members at a marketing firm claim that the average annual salary of the firm's staff is less than the state's average annual

Question 1. Staff members at a marketing firm claim that the average annual salary of the firm's staff is less than the state's average annual salary, which is $35,000. To test this claim, a random sample of 30 of the firm's staff members is analyzed. The mean annual salary is $32,450. Assume the population standard deviation is $4700, At the 5% level of significance, test the staff's claim

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