Researchers want to see if letting factory workers listen to music will affect productivity. The population in this factory produces a mean of μ = 100 niblits per hour with a σ = 10. The managers of this factory choose one worker to listen to music through headphones for a week. After a week they produce 112 niblits per hour.
Population 1:
Population 2:
Research Hypothesis:
Null Hypothesis:
To convert the sample score to Z score use: Z = (X - M) / SD
Sample Z- Score: Z=
Is this a one tailed or two tailed hypothesis?
I want to be sure that my result can only happen 5% of the time if the null hypothesis is true. Use the Z-table to find out what the cutoff should be.
Cutoff Z-Score: Z=
Decision:
Interpretation: