When does Counterbalancing will be inappropriate?
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When does Counterbalancing will be inappropriate?
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- Researcher believe that 75% of students (or more) can benefit from listening to music while studying for an exam. To verify this, they recruited 120 high school students from different grade levels (Freshmen to Senior) to participate in a study. The students were asked to take a test immediately after they studied a new subject in a room for three hours. The researchers asked students to repeat the process two times: once without listening to music and another time while listening to their preferred music. The order of the tests (with or without music) and the subjects were randomly assigned. The researchers recorded the difference between with-music and without-music scores to measure the impact of listening to music on score. In addition to the above information, they recorded students' gender. 7. Fill in the following blanks with all applicable variables from the information provided above. The response variable in this study is a. ________, which is a b. ________…A recent study claims that 40% of registered voters associate themselves with Democrats. 35% with Republicans, 20% Independent, 3% Green party, and 2% with Social democrats. In a sample of 400 individuals, we observed 200 Democrats 150 Republicanse 25 Independente 15 Green Partye 10 Social Democrats Test the claim at a=0.05.eThe HR department is trying to fill a vacant position for a job with a small talent pool. Valid applications arrive every week or so, and the applicants all seem to bring different levels of expertise. For each applicant, the HR manager gathers Information by trying to verify various claims on the candidate's résumé, but some doubt about "fit" always lingers when a decision to hire or not is to be made. Suppose that hiring an employee who is a bad fit for the company results in an error cost of $300, but failing to hire a good employee results in an error cost of $300 to the company. Although it is impossible to tell in advance whether an employee is a good fit, assume that the probability that an applicant is a "good fit" is 0.55, while the probability that an applicant is a "bad fit" is 1-0.55 0.45. Hiring an applicant who is a good fit, as well as not hiring an applicant who is a bad fit, results in no error cost to the company. For each decision in the following table, calculate…
- A medical researcher says that 25% of U.S. adults are smokers. In a random sample of 272 US, adults, 57 say that they are smokers at a- 0.05, is there enough evidence to support that less than 25% of U.S. adults are smokers? What shall we use for Ho and Hy? Hg p-0.25 Hp 025 Ho p> 025 Hi:p<025Read this passage of Active Listening vs Passive Listening and answer this first question.An SAT prep course claims to improve the test score of students. The table below shows the scores for seven students the first two times they took the verbal SAT. Before taking the SAT for the second time, each student took a course to try to improve his or her verbal SAT scores. Do these results support the claim that the SAT prep course improves the students' verbal SAT scores? Let d = (verbal SAT scores prior to taking the prep course)-(verbal SAT scores after taking the prep course). Use a significance level of α = 0.05 for the test. Assume that the verbal SAT scores are normally distributed for the population of students both before and after taking the SAT prep course. Student 1 2 3 4 567 Score on first SAT 380 440 470 490 440 Score on second SAT 420 530 530 550 460 420 410 490 430 Step 1 of 5: State the null and alternative hypotheses for the test. Answer 0 Ho: Md 0 Ha IVA A VI Copy Data Tables Keypad Keyboard Shortcuts
- ALREADY HAVE FIRST THREE ANSWERS NEED THE REST. ANOVA. Dr. Milgram is conducting a patient satisfaction survey, rating how well her patients like her on a scale of 1-10. Her patients tend to fall into three categories: “Like a lot”, “like somewhat”, and “dislike a lot”. She believes that she might get different satisfaction scores from people in each group, but (because she's not great at numbers) she wants you to do an ANOVA to be sure. She has collected data from 12 patients (three equal groups) with the following results. Group 1) “Like a lot” Mean: 8 SS: 2 N: df: Group 2) “Like somewhat” Mean: 5 SS: 6 N: df: Group 3) “Dislike a lot” Mean: 2 SS: 4 N: df: Grand Mean: 4 df Within-Group: 9 df Between-Groups: 2 Estimated Variance (S21) for Group 1: _______ Estimated Variance (S22)…In a recent study, 50 males used a new weight-loss supplement, and 39 of them experienced weight loss a 100 females used the same supplement, and 66 of them experienced weight loss after two weeks. Fill in the blanks below to make the most reasonable statement possible. The new weight-loss supplement was more effective on (Choose one) ▼ in the study. That is because only % of them failed to lose weight after two weeks, whereas % of the (Choose one) failed to lose weight after two weeks.If a police officer wants to find out whether the average speed of motorists on a highway with a speed limit of 55 mph is greater than 55 mph, then the null hypothesis is 55. false true
- In a recent study, 50 males used a new weight-loss supplement, and all but 15 of them experienced weight loss after two weeks. In the same study, 100 females used the same supplement, and all but 22 of them experienced weight loss after two weeks. Fill in the blanks below to make the most reasonable statement possible. The new weight-loss supplement was less effective on ▼(Choose one) in the study. That is because only % of them lost weight after two weeks, whereas % of the ▼(Choose one) lost weight after two weeks.Does second order slip perform better than the first order slip ?Justify your answer with evidenceAn SAT prep course claims to improve the test score of students. The table below shows the scores for seven students the first two times they took the verbal SAT. Before taking the SAT for the second time, each student took a course to try to improve his or her verbal SAT scores. Do these results support the claim that the SAT prep course improves the students' verbal SAT scores? Let d = (verbal SAT scores prior to taking the prep course)-(verbal SAT scores after taking the prep course). Use a significance level of a = 0.01 for the test. Assume that the verbal SAT scores are normally distributed for the population of students both before and after taking the SAT prep course. 1 234567 520 570 540 380 370 490 450 Student Score on first SAT Score on second SAT 540 600 610 470 410 510 480 Step 1 of 5: State the null and alternative hypotheses for the test. Answer 0 Ho: Md 0 Ha Ma IA IV V A || < = Copy Data Tables Keypad Keyboard Shortcuts