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March 1, 2015

Homework Help: statistics z or t test

Posted by Anonymous on Monday, July 19, 2010 at 1:01pm.

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
is this one tailed or two tailed test

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