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Hypotheses test. - Coggle Diagram
Hypotheses test.
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Possible conclusions
Reject H0 and conclude that the difference is significant (large enough that it is that it is not likely to be sampling to be sampling error).
Conclusion: The sample did not come
from a population with mean 34.29.
If you fail to reject H0, either: the sample came from a population with μ=34.29, or the sample came from a population with μ so close to 34.29 that you can’t tell the difference.
How to make conclusion
if p > 0.05, do not reject H0
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How to get p value
If σ is known
Z is belonged to normal distribution we can get a p value from the z value, the p(2-tail) is the area is the outside of enclosed of the cure.
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If σ is unknown
To obtain a p value, refer to the t
distribution with n–1 d.f.
get a t value by using table
if t calc is larger than t critical, the p value is less than 0.05
get a p value by using excel
p value= =TDIST( t calc, d.f. ,tial)
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