1800 candidates appeared for an examination, 450 were successful, 340 had attended a coaching class and out of these 200 came out successful. Estimate the utility of coaching class (use Yule's Coefficient. of Association).
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- What is a sample space?What are companies’ biggest obstacles to attracting the best talent? Of 703 surveyed U.S. and Canadian talent acquisition professionals, 464 reported that competition for talent is the biggest obstacle at their company. At the 0.05 level of significance, is there evidence that the proportion of all talent acquisition professionals who report competition is the biggest obstacle to attracting the best talent at their company is different from 60%?A manufacturer inspects 400 personal video players and finds that 399 of them have no defects. The manufacturer sent a shipment of 1,600 personal video players to a distributor. Predict the number of players in the shipment that are likely to have no defects.
- Are couples that live together before they get married just as likely to end up divorced within five years of marriage compared to couples that live apart before they get married? 268 of the 674 couples from the study who lived together before they got married were divorced within five years of marriage. 173 of the 405 couples from the study who lived apart before they got married were divorced within five years of marriage. What can be concluded at the = 0.05 level of significance? For this study, we should use Select an answer z-test for a population proportion t-test for a population mean t-test for the difference between two independent population means z-test for the difference between two population proportions t-test for the difference between two dependent population means The null and alternative hypotheses would be: Select an answer μ1 p1 Select an answer ≠ > < = Select an answer p2 μ2 Select an answer μ1 p1 Select an answer < = > ≠ Select…A research is presented. For each, identify the (A) population and (B) sample in the study 3. Researchers want to determine whether or not higher folate intake is associated with a lower risk of hypertension (high blood pressure) in women (927 to 44 years of age). To make this determination, they look at 7373 cases of hypertension in these women and find that those consume at least 1000 micrograms per day of total folate had a decreased risk of hypertension compared with those who consume less than 200 A: B:Are couples that live together before they get married more likely to end up divorced within five years of marriage compared to couples that live apart before they get married? 237 of the 614 couples from the study who lived together before they got married were divorced within five years of marriage. 161 of the 427 couples from the study who lived apart before they got married were divorced within five years of marriage. What can be concluded at the = 0.05 level of significance? For this study, we should use Select an answer z-test for a population proportion z-test for the difference between two population proportions t-test for the difference between two dependent population means t-test for a population mean t-test for the difference between two independent population means The null and alternative hypotheses would be: Select an answer μ1 p1 Select an answer ≠ < > = Select an answer μ2 p2 Select an answer p1 μ1 Select an answer ≠ > < = Select an…
- A new study followed 483 workers after someone exposed to her first factor and others were not. Of the 212 exposed workers, 40 develop cancer. Of the 271 non-expose workers 18 develop cancer determine the relative risk factor of cancer rounded to the nearest hundredIt is believed that from among senior high school students, 15% would like to pursue engineering course. Suppose a random survey reveals that 85 out of 600 students choose engineering course, would you say that the percentage of those who would pursue engineering course is less than 15%? Use 0.05 level of significance.A school district decided to measure the BMI of all 3rd graders and identify the highest 1% and lowest 1% of those students, and those students will be included in a follow up program. If Abby's BMI is converted to a z score of -2.18, would she be included in the program?
- A research study wishes to examine if there is a relationship between type of exercise (marathon, yoga, or cross fit) and getting hypertension (or not getting hypertension). Of the 78 marathon runners, 14 get hypertension. Of the 63 yoga practitioners, 6 get hypertension. Among the 54 CrossFit athletes, 16 get hypertension. What is the critical value for the test statistic?Freemont Run Club surveyed a random sample of 303030 of their members about their running habits. Of the members surveyed, 999 said that they run more than 555 days a week. There are 848484 Freemont Run Club members. Based on the data, what is the most reasonable estimate for the number of Freemont Run Club members who run more than 555 days a week?In a survey of 909 U.S.adults with children conducted by the financial Industry Regulatory Authority, 309 said that they had saved money for their children's college education. Can you conclude that more than 30% of U.S. adults with children have saved money for college? Use the a=0.05 level of significance.
