ants wearing seat belts, 14 were killed. Use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) h (c) below. C... t the claim using a hypothesis test. der 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 Il and alternative hypotheses for the hypothesis test? Ho: P₁ = P2 B. Ho: P₁ P2 H₁: P₁ P₂ OC. Ho: P₁ = P2 H₁: P₁ P2 H₁: P₁ P₂ Ho: P₁ P₂ O E. Ho: P₁ P2 H₁: P₁ = P₂ OF. Ho: P₁ = P2 H₁: P₁ P2 H₁: P₁ P2 y the test statistic. d to two decimal places as needed.) y the P-value. e=0 d to three decimal places as needed.) s the conclusion based on the hypothesis test? -value is sufficient evidence to support the claim that the the significance level of α = 0.05, so rate is higher for those not wearing seat belts. t the claim by constructing an appropriate confidence interval. Opropriate confidence interval is < (P₁-P₂) <. d to three decimal places as needed.) s the conclusion based on the confidence interval? se the confidence interval limits ▼values, it appears that the fatality rate is for those not wearing seat belts. at do the results suggest about the effectiveness of seat belts? The results suggest that the use of seat belts is associated with the same fatality rates as not using seat belts. The results suggest that the use of seat belts is associated with lower fatality rates than not using seat belts. The results suggest that the use of seat belts is associated with higher fatality rates than not using seat belts. The results are inconclusive. the null hypothesis. There ▼0, it appears that the two fatality rates are Because the confidence interval limits include
ants wearing seat belts, 14 were killed. Use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) h (c) below. C... t the claim using a hypothesis test. der 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 Il and alternative hypotheses for the hypothesis test? Ho: P₁ = P2 B. Ho: P₁ P2 H₁: P₁ P₂ OC. Ho: P₁ = P2 H₁: P₁ P2 H₁: P₁ P₂ Ho: P₁ P₂ O E. Ho: P₁ P2 H₁: P₁ = P₂ OF. Ho: P₁ = P2 H₁: P₁ P2 H₁: P₁ P2 y the test statistic. d to two decimal places as needed.) y the P-value. e=0 d to three decimal places as needed.) s the conclusion based on the hypothesis test? -value is sufficient evidence to support the claim that the the significance level of α = 0.05, so rate is higher for those not wearing seat belts. t the claim by constructing an appropriate confidence interval. Opropriate confidence interval is < (P₁-P₂) <. d to three decimal places as needed.) s the conclusion based on the confidence interval? se the confidence interval limits ▼values, it appears that the fatality rate is for those not wearing seat belts. at do the results suggest about the effectiveness of seat belts? The results suggest that the use of seat belts is associated with the same fatality rates as not using seat belts. The results suggest that the use of seat belts is associated with lower fatality rates than not using seat belts. The results suggest that the use of seat belts is associated with higher fatality rates than not using seat belts. The results are inconclusive. the null hypothesis. There ▼0, it appears that the two fatality rates are Because the confidence interval limits include
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
Related questions
Question
Transcribed Image Text:A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2932 occupants not wearing seat belts, 39 were killed. Among 7880
occupants wearing seat belts, 14 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 sample to be the sample of occupants wearing seat belts. What are
the null and alternative hypotheses for the hypothesis test?
O A. Ho: P₁ = P2
OB. Ho: P₁ P2
OC. Ho: P₁ = P₂
H₁: P₁ P₂
H₁: P₁ P₂
H₁: P₁
P₂
O D. Ho: P₁ P2
E. Ho: P₁ P2
H₁: P₁ = P2
OF. Ho: P₁ = P2
H₁: P₁ P₂
H₁: P₁ P₂
Identify the test statistic.
Z=
(Round to two decimal places as needed.)
Identify the P-value.
P-value=
(Round to three decimal places as needed.)
What is the conclusion based on the hypothesis test?
The P-value is
sufficient evidence to support the claim that the
the significance level of α = 0.05, so
fatality rate is higher for those not wearing seat belts.
b. Test the claim by constructing an appropriate confidence interval.
The appropriate confidence interval is < (P₁-P₂) <.
(Round to three decimal places as needed.)
What is the conclusion based on the confidence interval?
Because the confidence interval limits
values, it appears that the fatality rate is
for those not wearing seat belts.
c. What do the results suggest about the effectiveness of seat belts?
O A. The results suggest that the use of seat belts is associated with the same fatality rates as not using seat belts.
B. The results suggest that the use of seat belts is associated with lower fatality rates than not using seat belts.
C. The results suggest that the use of seat belts is associated with higher fatality rates than not using seat belts.
O D. The results are inconclusive.
the null hypothesis. There
▼0, it appears that the two fatality rates are
▼Because the confidence interval limits include
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