Have harsher penalties and ad campaigns increased seat-belt use among drivers an

Question

Have harsher penalties and ad campaigns increased seat-belt use among drivers and passengers? Observations of commuter traffic have failed to find evidence of a significant change compared with three years ago. Explain what the study's P-value of 0.43 means in this context. What does the P-value mean? O A. The P-value 0.43 is the probability of getting resuits like the ones obtained in the study by natural variation alone, assuming that the proportion of commuters who wear seat belts has increased O B. The P-value 0.43 is the probability that the proportion of commuters who wear seat belts has not changed O c. one minus the P-value, or 0.57, is the probability that the proportion of commuters who wear seat belts has changed. O D. The P-value 0.43 is the probability that the proportion of commuters who wear seat belts has changed. O E. The P-value 0.43 is the probability of getting results like the ones obtained in the study by natural variation alone, assuming that the proportion of commuters who wear seat belts has not changed.

Explanation / Answer

Solution

Here, null hypothesis will be proportion of commuters who wear seat belts has not changed and,

alternate hypothesis is  proportion of commuters who wear seat belts has changed.

So, p = 0.43

so option E

The p value 0.43 is the probability of getting results like the ones obtained in the study by natural variation alone, assuming that the proportion of commuters who wear seat belts has not changed

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