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

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Statistics

The Bureau of Labor Statistics reported that the average yearlyincome of dentists in the year 2012 was $110,000.  Asample of 81 dentists, which was taken in 2013, showed an averageyearly income of $120,000.  Assume the standard deviationof the population of dentists’ incomes in2013 is $36,000.

Test the hypotheses at 95% confidence.

Answer & Explanation Solved by verified expert
4.1 Ratings (532 Votes)
Given 110000 120000 36000 n 81 005TheHypothesisH0 110000Ha 110000This is a 2 tailed testThe TestStatistic Since the population standard deviation    See Answer
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