A traffic safety company publishes reports about motorcycle fatalities and helme

Question

A traffic safety company publishes reports about motorcycle fatalities and helmet use. In the first accompanying data table, the distribution shows the proportion of fatalities by location of injury for motorcycle accidents. The second data table shows the location of injury and fatalities for 2057 riders not wearing a helmet. Complete parts (a) and (b) below. (a) Does the distribution of fatal injuries for riders not wearing a helmet follow the distribution for all riders? Use alpha = 0.01 level of significance. What are the null and alternative hypotheses? A. H_0: The distribution of fatal injuries for riders not wearing a helmet follows the same distribution for all other riders. H_1: The distribution of fatal injuries for riders not wearing a helmet does not follow the same distribution for all other riders. B. H_0: The distribution of fatal injuries for riders not wearing a helmet does not follow the same distribution for all other riders. H_1: The distribution of fatal injuries for riders not wearing a helmet does follow the same distribution for all other riders. C. None of these Compute the expected counts for each fatal injury (Round to two decimal places as needed.)

Explanation / Answer

The null and alternative hypotheses are given by:

The null hypothesis, H0: The distribution of fatal injuries for riders not wearing a helmet follows the same distribution for all other riders.

The alternative hypothesis, H1: The distribution of fatal injuries for riders not wearing a helmet does not follow the same distribution for all other riders.

So option (A) is the correct choice. (Ans).

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