Question

Proportion of fatalities by location of injury for motorcycle accidents Location of injury Multiple locations Head...

Proportion of fatalities by location of injury for motorcycle accidents

Location of injury

Multiple locations

Head

Neck

Thorax

​Abdomen/ Lumbar/ Spine

Full data set

  

Proportion

0.570

0.310

0.030

0.060

0.030

Location of injury

Multiple locations

Head

Neck

Thorax

​Abdomen/ Lumbar/ Spine

Number

1033

864

33

84

45

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 2059

riders not wearing a helmet. Complete parts ​(a) and ​(b) below

Location of injury

Observed Count

Expected Count

Multiple Locations

1033

___

Head

864

___

Neck

33

___

Thorax

84

___

​Abdomen/Lumbar/Spine

45

___

​(Round to two decimal places as​ needed.)

0 0
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Answer #1

The expected counts are obtained by multiplying the proportions with the total number of riders.The R code and output are given

Multiple locations :1173.63

head : 638.29

Neck :   61.77

Thorax :  123.54

Abdomen : 61.77

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