Choose the correct answer for the following question: A simple ranom sample of thont-seat occupants involved in car crashes is obtained. Among 1550 occupants not wearing seat belts, 12 were Ailled Among 6500 occupants wearing seat belts, 12 were killed. Using this data with 0.05 significance level to test the claim that the fatality rate higher for those not wearing seat belts, the alternative hypothesis is given as of 017 a. HP2 362 b. H:Pi SP2 et917 C. H: P P: ce362dc1917 ce362dcto17 ce362 c1917 dcf917 ce362ac1917 O 0 0 O

Choose the correct answer for the following question: A simple ranom sample of thont-seat occupants involved in car crashes is obtained. Among 1550 occupants not wearing seat belts, 12 were Ailled Among 6500 occupants wearing seat belts, 12 were killed. Using this data with 0.05 significance level to test the claim that the fatality rate higher for those not wearing seat belts, the alternative hypothesis is given as of 017 a. HP2 362 b. H:Pi SP2 et917 C. H: P P: ce362dc1917 ce362dcto17 ce362 c1917 dcf917 ce362ac1917 O 0 0 O

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College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.7: Probability

Problem 58E: What is meant by the sample space of an experiment?

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What is meant by the sample space of an experiment?
What is an experiment?
A researcher looks at the mean salaries of male and female electricians and decides based on the evidence that there is no difference between the two groups. Given that there was a failure to reject the null hypothesis, it is possible that a type II error was made. Given the type of error made in this situation, what could researchers do to reduce the risk of this error? Choose a .01 significance level, instead of a .05 significance level. Increase the sample size.
If 31 were killed in 2823 accidents for those not wearing seat belts and 16 were killed in 7765 accidents for those wearing seat belts, use a 0.05 significance level to determind if seat belts are effective in reducing fatalities. Give the test statistic z and your yes or no conclusion.
An investigator reviewed the medical records of 200 children seen for care at Boston Medical Center in the past year who were between the ages 8 and 12 and identified 40 children with asthma. He also identified 40 children of the same ages who were free of asthma. Each child and their family were interviewed to assess whether there might be an association between certain environmental factors such as exposure to second-hand smoke. This study is an example of a: Case-Control Study Crossover Trial Cohort Study Randomized Control Trial
in a study of 420,129 cell phone users, 118 subjects developed cancer of the brain or nervous system. Test the claim of a somewhat common belief that such cancers are affected by cell phone use. That is, test the claim that cell phone users develop cancer of the brain or nervous system at a rate that is different from the rate of 0.0340% for people who do not use cell phones. Because this issue has such great importance, use a 0.005 significance level. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method and the normal distribution as an approximation to the binomial distribution.
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A researcher was interested in whether there were differences in the level of activity in children who had been diagnosed with ADHA depending on whether they had received no treatment, were on Ritalin, or were in a behavior management program. He recruited 90 children with ADHD to participate, and randomly assigned each child to one of the three groups. The number of classroom disturbances during a 1 hour period was measured for each child. Which statistical test would be best to determine if there is a significant difference between groups? one-sample t-test dependent samples t-test independent samples t-test ANOVA
A researcher was interested in whether there were differences in the level of activity in children who had been diagnosed with ADHA depending on whether they had received no treatment, were on Ritalin, or were in a behavior management program. He recruited 90 children with ADHD to participate, and randomly assigned each child to one of the three groups. The number of classroom disturbances during a 1 hour period was measured for each child. Which statistical test would be best to determine if there is a significant difference between groups? one-sample t-test dependent samples t-test ANOVA
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