New road signs are made with the intention of improving visibility to drivers. H

Question

New road signs are made with the intention of improving visibility to drivers. Highway safety engineers setup a test course that included both the old and the new signs. Volunteers drove the test course and rated the old and new signs in terms of visibility.

1. (0.2 point) Write the null and alternative hypotheses "in words" using "improved visibility" and "not improved visibility".

2. (0.2 point) Using the hypotheses, write what would constitute a TYPE I error in the context of the problem.

3. (0.2 point) What would be the consequence of the TYPE I error?

4. (0.2 point) What would be a TYPE II error in the context of the problem?

5. (0.2 point) What would be the consequence of the TYPE II error?

Explanation / Answer

1)

Ho : the roads improved visibility

h1 :  the roads dont improved visibility

2)

type I error is reject Ho when in fact the improved of visilitiy is equal

3)

the new roads signs can be more accidents in that road for the old signs

4)

fail to reject Ho when in fact there is a difference between the old and new signs in visilibty

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