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We take another look at the Level of Confidence by using an example of a normal distribution of a population where the critical region is at Z-score=1.288 where the level of confidence=90%. If all 10 test statistics fall with in the critical region, we will correctly reject the null hypothesis in 9/10 cases.

Previous video in this series can be seen at:
https://youtu.be/YGuuZytPz3g
Next video in this series can be seen at:
https://youtu.be/0STa_CLrNUY