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A: Given: ∑n=1an2 - ∑n=0a-1n2
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A: Solution-: Define a Type 1 error and a type 2 error and explain the consequences of each.
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A: given data n = 144 p^ =0.5 95% ci ; E = ?
Q: 9
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Among 13,200 submitted abstracts that were blindly evaluated (with authors and
institutions not identified), 26.7% were accepted for publication. Among 13,433 abstracts that
were not blindly evaluated, 29.0% were accepted (based on data from “Effect of Blinded Peer
Review on Abstract Acceptance,” by Ross et al., Journal of the American Medical Association,
Vol. 295, No. 14). Use a 0.01 significance level to test the claim that the acceptance rate is the
same with or without blinding. How might the results be explained?
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- What is meant by the sample space of an experiment?What is an experiment?The article "Display of Health Risk Behaviors on MySpace by Adolescents"+ described a study in which researchers looked at a random sample of 500 publicly accessible MySpace web profiles posted by 18-year-olds. The content of each profile was analyzed. One of the conclusions reported was that displaying sport or hobby involvement was associated with decreased references to risky behavior (sexual references or references to substance abuse or violence). (a) Is the study described an observational study or an experiment? an observational study an experiment (b) Is it reasonable to generalize the stated conclusion to all 18-year-olds with a publicly accessible MySpace web profile? What aspect of the study supports your answer? No, it is not reasonable to generalize the stated conclusion since the study didn't include all 18-year-olds on MySpace. No, it is not reasonable to generalize the stated conclusion since the study was an experiment and you cannot generalize conclusions to…
- In a program designed to help patients stop smoking, 198 patients were given sustained care, and 82.8% of them were no longer smoking after one month(based on data from “ Sustained Care Intervention and Postdischarge Smoking Cessation Among Hospitalized Adults,” by Rigotti et al., Journal of American Association , Vol. 312, N0.7). Use a significance level of ? = 0.01 ?? ???? ?h? ????? ?h?? 80% ?? ???????? ???? ??????? ?h?? ?????? ????????? ?are State the null and alternate hypotheses (write it mathematically) and write your claim. Find the standardized test statistic. Identify /separate the Rejection Region (Critical Region) from the Fail to Reject Region using the critical values. j. Find the p-value and interpret its meaning. Decide whether to reject or fail to reject the null using the p-value approach. l. Make an interpretation of your decision in the context of the claim. Does sustain care appear to be effective. m. What is Type 2 error? Explain its consequence in the context…What source of variation is found in an ANOVA summary table for a within subjects design that is not in an ANOVA summary table for a between subjects design. What happens to this source of variation in a between-subjects design?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?
- 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 ANOVAA study of sleepwalking or "nocturnal wandering" was described in the journal Neurology, and it included information that 29.2% of 19,136 American adults have sleepwalked. Would a reporter be justified in stating that "fewer than 30% of adults have sleepwalked"? Let's use a 0.05 significance level to test the claim that for the adult population, the proportion of those who have sleepwalked is less than 0.30. Question: In symbols, what is the claim? O p=0.3 O p0.3 p>0.292 O p=0.292 pA 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
- In a study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment, and 32 were not smoking one year after the treatment (based on data from “High Dose Nicotine Patch Therapy,” by Dale et al., Journal of the American Medical Association, Vol. 274, No. 17). We want to use a 0.05 significance level to test the claim that among smokers who try to quit with nicotine patch therapy, the majority are smoking a year after the treatment. Describe a type I error for this test.In a study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment, and 32 were not smoking one year after the treatment (based on data from “High Dose Nicotine Patch Therapy,” by Dale et al., Journal of the American Medical Association, Vol. 274, No. 17). We want to use a 0.05 significance level to test the claim that among smokers who try to quit with nicotine patch therapy, the majority are smoking a year after the treatment. What do you conclude? (Be sure to address the original claim that the mean weight is 5.670 grams).d. What is the P-value? e. What do you conclude? (Be sure to address the original claim that among smokers who try to quit with nicotine patch therapy, the majority are smoking a year after the treatment.) f. Describe a type I error for this test. g. Describe a type II error for this test.
