Question: According to a census that was conducted five years ago, the mean annual household salary in the city of Townsburg was $40,397. The mayor of
According to a census that was conducted five years ago, the mean annual household salary in the city of Townsburg was $40,397. The mayor of Townsburg believes that there has been an economic upturn in the city since then. He appoints a team to test for evidence that the mean annual household salary in Townsburg has increased. The teams surveys a sample of 37 households. The sample has a mean annual salary of $41,093 with a standard deviation of $3271.
Test for evidence that the mean annual household salary in Townsburg has increased during the last five years. Use a level of significance of= 0.10.
(is it rejected)
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