An environmental scientist wants to test the null hypothesis that an antipollution device for cars is not effective. Under which of the following conditions would a Type I error be committed?

The scientist concludes that the antipollution device is effective when it actually is not.

The scientist concludes that the antipollution device is not effective when it actually is.

The scientist concludes that the antipollution device is not effective when it actually is not.

A Type I error cannot be committed in this situation.