Posted by **Anonymous** on Sunday, July 18, 2010 at 10:10pm.

the average weekly earnings of a production worker were $424. to know if wages, on average, have gone up since that time. To test this, you sample 64 production workers, and determine that their average salary is $432.69, with a sample standard deviation of $33.90. Use a 0.05 level of significance .carry out test .

is it t test or z test ? how would we know

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