H0: µ=2.5
Ha: µ>2.5
We know the population standard deviation σ, so use the z-test:
z = (2.9-2.5)/(0.7/√35) = 3.381
P = 3.617*10-4
Since P<0.05, the result is significant at the 0.05-level, so reject H0.
Tito X.
asked 12/04/13
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