Question
In: Statistics and Probability
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2975 occupants...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2975 occupants not wearing seat belts, 33 were killed. Among 7896 occupants wearing seat belts, 12 were killed. Use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below.
a. What are the null and alternative hypothesis for the hypothesis test?
b. what is the test statistic (two decimal)
c. what is the p-value (three decimal)
d. what is the conclusion based on the hypothesis test?
e. What is the confidence interval? x < (p1-p2) < x (three decimal)
f. what is the conclusion based on the confidence interval?
Solutions
orchestra answered 2 years agoRelated Solutions
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2500 occupants...
A simple random sample of front-seat occupants involved in car
crashes is obtained. Among 2500 occupants not wearing seat belts,
15 were killed. Among 7500 occupants wearing seat belts, 15 were
killed. Use this data with 0.05 significance level to test the
claim that the fatality rate is higher for those not wearing seat
belts. (Write all necessary steps like Hypotheses, Test Statistic,
P-value & Conclusion) Given that P(z<3.17)=0.9992.
A simple random sample of? front-seat occupants involved in car crashes is obtained. Among 27542754 occupants...
A simple random sample of? front-seat occupants involved in car
crashes is obtained. Among
27542754
occupants not wearing seat? belts,
3535
were killed. Among
78147814
occupants wearing seat? belts,
1818
were killed. Use a
0.010.01
significance level to test the claim that seat belts are
effective in reducing fatalities. Complete parts? (a) through? (c)
below.
a. Test the claim using a hypothesis test.
Consider the first sample to be the sample of occupants not
wearing seat belts and the second...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2901 occupants...
A simple random sample of front-seat occupants involved in car
crashes is obtained. Among 2901 occupants not wearing seat
belts,27 were killed. Among 7877 occupants wearing seat belts,16
were killed. Use a 0.01 significance level to test the claim that
seat belts are effective in reducing fatalities. Complete parts
(a) through (c) below.
a. Test the claim using a hypothesis test.
Consider the first sample to be the sample of occupants not
wearing seat belts and the second sample to...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2991 occupants...
A simple random sample of front-seat occupants involved in car
crashes is obtained. Among 2991 occupants not wearing seat belts,
28 were killed. Among 7768 occupants wearing seat belts, 16 were
killed. Use a 0.05 significance level to test the claim that seat
belts are effective in reducing fatalities. Complete parts (a)
through (c) below.
a. Test the claim using a hypothesis test.
b. Identify the test statistic
c. P-value
d. Confidence interval
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2989 occupants...
A simple random sample of front-seat occupants involved in car
crashes is obtained. Among
2989
occupants not wearing seat belts, 29 were killed. Among 7785
occupants wearing seat belts, 12 were killed. Use a 0.05
significance level to test the claim that seat belts are effective
in reducing fatalities
a. Test the claim using a hypothesis test.
Consider the first sample to be the sample of occupants not
wearing seat belts and the second sample to be the sample of...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2719 occupants...
A simple random sample of front-seat occupants involved in car
crashes is obtained. Among 2719 occupants not wearing seat belts,
39 were killed. Among 7860 occupants wearing seat belts, 19 were
killed. Use a 0.05
significance level to test the claim that seat belts are
effective in reducing fatalities. Complete parts (a) through (c)
below.
a. Test the claim using a hypothesis test.
Consider the first sample to be the sample of occupants not
wearing seat belts and the second...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2964 occupants...
A simple random sample of front-seat occupants involved in car
crashes is obtained. Among 2964 occupants not wearing seat belts,
30 were killed. Among 7706 occupants wearing seat belts, 13 were
killed. Use a 0.05 significance level to test the claim that seat
belts are effective in reducing fatalities. Find the test statistic
Z to 3 decimal places, the P-value to 3 decimals, and find the
confidence interval.
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2700 occupants...
A simple random sample of front-seat occupants involved in car
crashes is obtained. Among 2700 occupants not wearing seat belts,
34 were killed. Among 7666 occupants wearing seat belts, 14 were
killed. Use a 0.01 significance level to test the claim that seat
belts are effective in reducing fatalities. Complete parts (a)
through (c) below. a. Test the claim using a hypothesis test.
Consider the first sample to be the sample of occupants not wearing
seat belts and the second...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2758 occupants...
A simple random sample of front-seat occupants involved in car
crashes is obtained. Among 2758 occupants not wearing seat belts,
30 were killed. Among 7650 occupants wearing seat belts, 12 were
killed. Use a 0.05 significance level to test the claim that seat
belts are effective in reducing fatalities.
Consider the first sample to be the sample of occupants not
wearing seat belts and the second sample to be the sample of
occupants wearing seat belts. What are the null...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2946 occupants...
A simple random sample of front-seat occupants involved in car
crashes is obtained. Among 2946 occupants not wearing seat belts,
31 were killed. Among 7602 occupants wearing seat belts, 16 were
killed. Use a 0.01significance level to test the claim that seat
belts are effective in reducing fatalities. Complete parts (a)
through (c) below.
a. Test the claim using a hypothesis
test.
Consider the first sample to be the sample of occupants not wearing
seat belts and the second...
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