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A car manufacturer is concerned about the effectiveness of a training course designed to get more driver to use seat belts in its automobiles. What hypothesis is he testing if he commits a type II error by erroneously concluding that the training course is effective?

While actually the course is ineffective BUT says Ha is effective

While actually the course is ineffective BUT says H0 is effective

While actually the course is effective BUT says H0 is effective

While the course is actually ineffective is type I error

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