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 2066 riders not wearing a helmet. Complete parts (a) and (b) below. Click the icon to view the tables. (a) Does the distribution of fatal injuries for riders not wearing a helmet follow the distribution for all riders? Use a = 0.01 level of significance. What are the null and alternative hypotheses? A. Ho: The distribution of fatal injuries for riders not wearing a helmet follows the same distribution for all other riders. He: The distribution of fatal injuries for riders not wearing a helmet does not follow the same distribution for all other riders. B. Ho: The distribution of fatal injuries for riders not wearing a helmet does not follow the same distribution for all other riders. Hj: The distribution of fatal injuries for riders not wearing a helmet does follow the same distribution for all other riders. None of these. Compute the expected counts for each fatal injury. Location of injury Observed Count Multiple Locations 1022 Expected Count Head 867 Neck 37 Thorax 90 Abdomen/Lumbar/Spine 50 (Round to two decimal places as needed.)

Answer 1

Here n= 5 0 E =(20)/n = 2066/5 1022 413.2 867 413.2 37 413.2 90 413.2 50 413.2 Total 2066 2066

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Here n= 4 0 E =(20)/n = 189/4 59 47.25 60 47.25 34 47.25 36 47.25 Total 189 189