A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2858 occupants not wearing seat belts, 33 were killed. Among 7700 occupants wearing seat belts, 15 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 be the sample of occupants wearing seat belts. What are the null and alternative hypotheses for the hypothesis test? O A. Ho: P1 = P2 H,: P1 > P2 O B. Ho: P1 S P2 H: P, +P2 OC. Ho: P1 = P2 H: P, #P2 OF. Ho: P, 2 P2 H,: P, #P2 O D. Ho: P1 P2 H,: P1 = P2 O E. Ho: P1 = P2 H,: P

A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2858 occupants not wearing seat belts, 33 were killed. Among 7700 occupants wearing seat belts, 15 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 be the sample of occupants wearing seat belts. What are the null and alternative hypotheses for the hypothesis test? O A. Ho: P1 = P2 H,: P1 > P2 O B. Ho: P1 S P2 H: P, +P2 OC. Ho: P1 = P2 H: P, #P2 OF. Ho: P, 2 P2 H,: P, #P2 O D. Ho: P1 P2 H,: P1 = P2 O E. Ho: P1 = P2 H,: P

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Description: A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2858 occupants not wearing seat belts, 33 were killed. Among 7700 occupants wearingseat belts, 15 were killed. Use a 0.01 significance level to test the claim

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

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Question

A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2858 occupants not wearing seat belts, 33 were killed. Among 7700 occupants wearing
seat belts, 15 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 be the sample of occupants wearing seat belts. What are the null and
alternative hypotheses for the hypothesis test?
...
O A. Ho: P1 = P2
H1: P1 > P2
O B. Ho: P1 sp2
O C. Ho: P1 = P2
H: P, #P2
H:P, #P2
O D. Ho: P1 # P2
H: P1 = P2
O E. Ho: P1 = P2
H,: P, <P2
O F. Ho: P1 2 P2
H4: P, #P2
Identify the test statistic.
(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
the significance level of a = 0.01, so
the null hypothesis. There
sufficient evidence to support the claim that the fatality rate is
- higher for those not wearing seat belts.
T-i IL - --:-- L..

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