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The Bureau of Labor Statistics reported that the average yearly income of dentists in the year...

  1. The Bureau of Labor Statistics reported that the average yearly income of dentists in the year 2018 was $110,000. Asample of 81 dentists, which was taken in 2019, showed an average yearly income of $120,000. Assume the standarddeviation of the population of dentists in 2019 is $36,000. We want to test to determine if there has been a significantdifference in the average yearly income of dentists.

Following the steps for hypothesis testing, conduct this hypothesis test at the 5% level of significance.

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