Asked by anonymous

The director of an advertising agency is concerned with the effectiveness of a television commercial.

What null hypothesis is she testing if she commits a type I error when she
erroneously says that the commercial is effective.
Answered by PsyDAG
Null hypotheses propose no effect.
Answered by Anonymous
The director of an advertising agency is concerned with the effectiveness of a television commercial.
- What null hypothesis is she testing if she makes a correct decision when she says that the commercial is not effective?
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