Homework Answers
By using the Ti-84 calculator we can solve this question easily.
The null and alternative hypothesis is
E. H0: p1 = p2
H1: p1 > p2
Level of significance = 0.01
Ti-84 calculator path is STAT ------>TESTS----->2-PropZTest---> Hit enter--->
x1 = 34
n1 = 2806
x2 = 19
n2 = 7804
p1: >p2 (this line always wants what’s in H1)
Calculate
We get z = 6.24
p-value = 0.000
P-value < 0.01 we reject null hypothesis.
Conclusion: Seat belt is effective in reducing fatalities.
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