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24 February, 21:17

Highway safety engineers test new road signs, hop - ing that increased reflectivity will make them more visible to drivers. Volunteers drive through a test course with several of the new - and old-style signs and rate which kind shows up the best. If the hypothesis is tested at the 1% level of significance instead of 5%, how will this affect the power of the test?

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  1. 24 February, 22:38
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    decreases

    Step-by-step explanation:

    H_0 : New road signs are equally visible

    H_α: New road signs are more visible Power

    Probability to reject the null hypothesis H_0, when H_0 is false.

    If the level of significance is smaller, then we are less likely to reject the null hypothesis and thus the power decreases.
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