If we retain the null hypothesis about the difference between two population means using the .05...
If we retain the null hypothesis about the difference between two population means using the .05 criterion of significance, what is the probability that we have made a Type I error? Explain your answer.
Homework Answers
Here level of significance is 
Type I error is rejection of true null hypothesis and also it is same as the level of significance
Hence answer here is Type I error is 0.05
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