Posted by Anonymous on .
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

statistics z or t test 
MathGuru,
See most recent post.