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

- statistics z or t test -
**MathGuru**, Monday, July 19, 2010 at 9:04pm
See most recent post.

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