Results on seat belt usage from the 2003 Youth Risk Behavior Survey were published in a USA Snapshot on January 13, 2005. The following table outlines the results from the high school students who were surveyed in the state of Nebraska. They were asked whether or not they rarely or never wear seat belts when riding in someone else's car. Using α = .05, does this sample present sufficient evidence to reject the hypothesis that gender is independent of seat belt usage?
Female | Male | |
Rarely or never use seat belt | 210 | 319 |
Uses seat belt | 1219 | 1168 |
(a) Find the test statistic. (Give your answer correct to two
decimal places.)
(ii) Find the p-value. (Give your answer bounds
exactly.)
< p <
(b) State the appropriate conclusion.
Reject the null hypothesis, there is significant evidence that gender is dependent to seat belt use. Fail to reject the null hypothesis, there is not significant evidence that gender is dependent to seat belt use. Reject the null hypothesis, there is not significant evidence that gender is dependent to seat belt use. Fail to reject the null hypothesis, there is significant evidence that gender is dependent to seat belt use.
Results on seat belt usage from the 2003 Youth Risk Behavior Survey were published in a...
Results on seat belt usage from the 2003 Youth Risk Behavior Survey were published in a USA Snapshot on January 13, 2005. The following table outlines the results from the high school students who were surveyed in the state of Nebraska. They were asked whether or not they rarely or never wear seat belts when riding in someone else's car. Using α = .05, does this sample present sufficient evidence to reject the hypothesis that gender is independent of seat...
In a survey of 1000 drivers from Region A, 849 wear a seat belt. In a survey of 1000 drivers from Region B, 906 wear a seat belt. At a = 0.01, is there evidence to support the claim that the proportion of drivers who wear seat belts in Region A is less than the proportion of drivers who wear seat belts in Region B? Assume that the samples are random and independent. Complete parts (a) through (e) below. (a)...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2882 occupants not wearing seat belts, 38 were killed. Among 7850 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. 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 2853 occupants not wearing seat belts, 36 were killed. Among 7754 occupants wearing seat belts, 18 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...
In what ways do advertisers in magazines use sexual imagery to appeal to youth? One study classified each of 1500 full-page or larger ads as "not sexual" or "sexual," according to the amount and style of the dress of the male or female model in the ad. The ads were also classified according to the age group of the intended readership. Here is a summary of the data Magazine readership age group Model dress Young adult Mature adult Not sexual...
In what ways do advertisers in magazines use sexual imagery to appeal to youth? One study classified each of 1500 full-page or larger ads as "not sexual" or "sexual," according to the amount and style of the dress of the male or female model in the ad. The ads were also classified according to the age group of the intended readership. Here is a summary of the data. Magazine readership age group Model dress Young adult Mature adult Not sexual...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2720 occupants not wearing seat belts, 30 were killed. Among 7791 occupants wearing seat belts, 18 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. 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...
In what ways do advertisers in magazines use sexual imagery to appeal to youth? One study classified each of 1509 full-page or larger ads as "not sexual" or "sexual," according to the amount and style of the dress of the male or female model in the ad. The ads were also classified according to the target readership of the magazine. Here is the two-way table of counts. Magazine readership Model dress Women Men General interest Total Not sexual 356 500...
Question Hele ha survey of 1000 drivers from Region A 876 war a seat belt in a way of drivers from Region 3,923 war abelt 001, is there evidence to suport the came that the proportion des who wear seat belts in Region A is loss than the proportion of who were botsin Rajon? Asume that the samples are random and independent. Complete ports through below Ventily the daim Lal population 1 bedies from Region and let population be drivers...
Two plots at Rothamsted Experimental Station were studied for production of wheat straw. For a random sample of years, the annual wheat straw production (in pounds) from one plot was as follows. 6.96 7.10 5.84 5.91 7.31 7.18 7.06 5.79 6.24 5.91 6.14 Use a calculator to verify that, for this plot, the sample variance is s2 ≈ 0.384. Another random sample of years for a second plot gave the following annual wheat production (in pounds). 5.91 5.91 5.91 5.91...