Basically, we want to know if the fatalities for those not wearing a seat belt (p1) is more than that for those wearing a seat belt.
= proportion of deaths for those wearing a seat belt = 28 / 2927 =
0.0096
= proportion of deaths for those wearing a seat belt = 17 / 7679 =
0.0022
Overall Proportion p = (28 + 17) / (2927 + 7679) = 14 / 10606 = 0.0042
1 - p = 0.9958
______________________
The Hypothesis: Option B
H0: p1 = p2
Ha: p1 > p2
__________________________
The Test Statistic:
_____________________________
The p Value: The p value (Right tail) for Z = 5.27, is; p value = 0.000
___________________________
The Conclusion: The p value
is lesser than
the significance level of
= 0.01, so reject the
null hypothesis.There is sufficient
evidence to support the claim.
Question Help Instructor-created question A simple random sample of front-soat occupants involved in car crashes is...
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